mirror of https://github.com/Desuuuu/klipper.git
stm32f1: Move ADC and SPI code from gpio.c to spi.c and adc.c
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
parent
581b1439f3
commit
6b108aa885
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@ -17,6 +17,8 @@ CFLAGS_klipper.elf += --specs=nano.specs --specs=nosys.specs
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# Add source files
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src-y += stm32f1/main.c stm32f1/timer.c stm32f1/gpio.c
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src-$(CONFIG_HAVE_GPIO_ADC) += stm32f1/adc.c
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src-$(CONFIG_HAVE_GPIO_SPI) += stm32f1/spi.c
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src-y += $(addprefix ../, $(wildcard lib/hal-stm32f1/source/stm32f1xx_ll_*.c))
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src-y += generic/crc16_ccitt.c generic/armcm_irq.c generic/timer_irq.c
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src-y += ../lib/cmsis-stm32f1/source/system_stm32f1xx.c
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@ -0,0 +1,109 @@
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// ADC functions on STM32F1
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//
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// Copyright (C) 2018 Grigori Goronzy <greg@kinoho.net>
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//
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include <stdbool.h> // bool
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#include "board/io.h" // readb
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#include "command.h" // shutdown
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#include "compiler.h" // ARRAY_SIZE
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#include "gpio.h" // gpio_adc_setup
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#include "internal.h" // GPIO
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#include "stm32f1xx_ll_adc.h" // LL_ADC_REG_ReadConversionData12
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#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetPinMode
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#include "sched.h" // sched_shutdown
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DECL_CONSTANT(ADC_MAX, 4095);
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#define ADC_DELAY (240 * 8)
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static bool adc_busy;
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static uint32_t adc_current_channel;
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static const uint8_t adc_pins[] = {
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GPIO('A', 0), GPIO('A', 1), GPIO('A', 2), GPIO('A', 3),
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GPIO('A', 4), GPIO('A', 5), GPIO('A', 6), GPIO('A', 7),
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GPIO('B', 0), GPIO('B', 1), GPIO('C', 0), GPIO('C', 1),
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GPIO('C', 2), GPIO('C', 3), GPIO('C', 4), GPIO('C', 5)
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};
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static const uint32_t adc_channels[] = {
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LL_ADC_CHANNEL_0,
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LL_ADC_CHANNEL_1,
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LL_ADC_CHANNEL_2,
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LL_ADC_CHANNEL_3,
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LL_ADC_CHANNEL_4,
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LL_ADC_CHANNEL_5,
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LL_ADC_CHANNEL_6,
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LL_ADC_CHANNEL_7,
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LL_ADC_CHANNEL_8,
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LL_ADC_CHANNEL_9,
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LL_ADC_CHANNEL_10,
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LL_ADC_CHANNEL_11,
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LL_ADC_CHANNEL_12,
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LL_ADC_CHANNEL_13,
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LL_ADC_CHANNEL_14,
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LL_ADC_CHANNEL_15,
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};
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struct gpio_adc
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gpio_adc_setup(uint8_t pin)
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{
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// Find pin in adc_pins table
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int chan;
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for (chan=0; ; chan++) {
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if (chan >= ARRAY_SIZE(adc_pins))
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shutdown("Not a valid ADC pin");
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if (adc_pins[chan] == pin)
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break;
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}
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GPIO_TypeDef *regs = digital_regs[GPIO2PORT(pin)];
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uint32_t bit = digital_pins[pin % 16];
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LL_GPIO_SetPinMode(regs, bit, LL_GPIO_MODE_ANALOG);
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return (struct gpio_adc){ .bit = adc_channels[chan] };
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}
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// Try to sample a value. Returns zero if sample ready, otherwise
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// returns the number of clock ticks the caller should wait before
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// retrying this function.
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uint32_t
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gpio_adc_sample(struct gpio_adc g)
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{
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/* ADC not busy, start conversion */
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if (!readb(&adc_busy)) {
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LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, g.bit);
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LL_ADC_SetChannelSamplingTime(ADC1, g.bit, LL_ADC_SAMPLINGTIME_239CYCLES_5);
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LL_ADC_REG_StartConversionSWStart(ADC1);
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adc_busy = true;
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adc_current_channel = g.bit;
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return ADC_DELAY;
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/* ADC finished conversion for this channel */
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} else if (LL_ADC_IsActiveFlag_EOS(ADC1) &&
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readl(&adc_current_channel) == g.bit) {
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LL_ADC_ClearFlag_EOS(ADC1);
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adc_busy = false;
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return 0;
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}
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/* Wants to sample another channel, or not finished yet */
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return ADC_DELAY;
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}
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// Read a value; use only after gpio_adc_sample() returns zero
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uint16_t
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gpio_adc_read(struct gpio_adc g)
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{
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return LL_ADC_REG_ReadConversionData12(ADC1);
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}
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// Cancel a sample that may have been started with gpio_adc_sample()
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void
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gpio_adc_cancel_sample(struct gpio_adc g)
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{
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if (readb(&adc_busy) && readl(&adc_current_channel) == g.bit) {
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adc_busy = false;
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LL_ADC_ClearFlag_EOS(ADC1);
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}
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}
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@ -4,34 +4,24 @@
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//
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include <stdint.h> // uint32_t
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#include <stdbool.h>
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#include "autoconf.h" // CONFIG_CLOCK_FREQ
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#include "board/irq.h" // irq_save
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#include "command.h" // shutdown
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#include "compiler.h" // ARRAY_SIZE
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#include "gpio.h" // gpio_out_setup
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#include "stm32f1xx.h"
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#include "stm32f1xx_ll_rcc.h"
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#include "stm32f1xx_ll_gpio.h"
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#include "stm32f1xx_ll_adc.h"
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#include "stm32f1xx_ll_spi.h"
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#include "internal.h" // GPIO
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#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetPinMode
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#include "sched.h" // sched_shutdown
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#include "board/irq.h"
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#include "board/io.h"
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/****************************************************************
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* Pin mappings
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****************************************************************/
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#define GPIO(PORT, NUM) (((PORT)-'A') * 16 + (NUM))
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#define GPIO2PORT(PIN) ((PIN) / 16)
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static GPIO_TypeDef *const digital_regs[] = {
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GPIO_TypeDef *const digital_regs[] = {
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GPIOA, GPIOB, GPIOC, GPIOD, GPIOE
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};
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static uint32_t const digital_pins[] = {
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uint32_t const digital_pins[] = {
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LL_GPIO_PIN_0,
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LL_GPIO_PIN_1,
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LL_GPIO_PIN_2,
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@ -136,205 +126,3 @@ gpio_in_read(struct gpio_in g)
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{
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return LL_GPIO_IsInputPinSet(g.regs, g.bit);
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}
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/****************************************************************
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* Analog to Digital Converter (ADC) pins
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****************************************************************/
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DECL_CONSTANT(ADC_MAX, 4095);
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#define ADC_DELAY (240 * 8)
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static bool adc_busy;
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static uint32_t adc_current_channel;
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static const uint8_t adc_pins[] = {
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GPIO('A', 0), GPIO('A', 1), GPIO('A', 2), GPIO('A', 3),
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GPIO('A', 4), GPIO('A', 5), GPIO('A', 6), GPIO('A', 7),
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GPIO('B', 0), GPIO('B', 1), GPIO('C', 0), GPIO('C', 1),
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GPIO('C', 2), GPIO('C', 3), GPIO('C', 4), GPIO('C', 5)
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};
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static const uint32_t adc_channels[] = {
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LL_ADC_CHANNEL_0,
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LL_ADC_CHANNEL_1,
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LL_ADC_CHANNEL_2,
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LL_ADC_CHANNEL_3,
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LL_ADC_CHANNEL_4,
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LL_ADC_CHANNEL_5,
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LL_ADC_CHANNEL_6,
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LL_ADC_CHANNEL_7,
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LL_ADC_CHANNEL_8,
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LL_ADC_CHANNEL_9,
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LL_ADC_CHANNEL_10,
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LL_ADC_CHANNEL_11,
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LL_ADC_CHANNEL_12,
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LL_ADC_CHANNEL_13,
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LL_ADC_CHANNEL_14,
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LL_ADC_CHANNEL_15,
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};
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struct gpio_adc
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gpio_adc_setup(uint8_t pin)
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{
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// Find pin in adc_pins table
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int chan;
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for (chan=0; ; chan++) {
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if (chan >= ARRAY_SIZE(adc_pins))
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shutdown("Not a valid ADC pin");
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if (adc_pins[chan] == pin)
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break;
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}
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GPIO_TypeDef *regs = digital_regs[GPIO2PORT(pin)];
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uint32_t bit = digital_pins[pin % 16];
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LL_GPIO_SetPinMode(regs, bit, LL_GPIO_MODE_ANALOG);
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return (struct gpio_adc){ .bit = adc_channels[chan] };
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}
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// Try to sample a value. Returns zero if sample ready, otherwise
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// returns the number of clock ticks the caller should wait before
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// retrying this function.
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uint32_t
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gpio_adc_sample(struct gpio_adc g)
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{
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/* ADC not busy, start conversion */
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if (!readb(&adc_busy)) {
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LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, g.bit);
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LL_ADC_SetChannelSamplingTime(ADC1, g.bit, LL_ADC_SAMPLINGTIME_239CYCLES_5);
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LL_ADC_REG_StartConversionSWStart(ADC1);
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adc_busy = true;
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adc_current_channel = g.bit;
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return ADC_DELAY;
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/* ADC finished conversion for this channel */
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} else if (LL_ADC_IsActiveFlag_EOS(ADC1) &&
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readl(&adc_current_channel) == g.bit) {
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LL_ADC_ClearFlag_EOS(ADC1);
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adc_busy = false;
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return 0;
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}
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/* Wants to sample another channel, or not finished yet */
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return ADC_DELAY;
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}
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// Read a value; use only after gpio_adc_sample() returns zero
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uint16_t
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gpio_adc_read(struct gpio_adc g)
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{
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return LL_ADC_REG_ReadConversionData12(ADC1);
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}
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// Cancel a sample that may have been started with gpio_adc_sample()
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void
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gpio_adc_cancel_sample(struct gpio_adc g)
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{
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if (readb(&adc_busy) && readl(&adc_current_channel) == g.bit) {
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adc_busy = false;
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LL_ADC_ClearFlag_EOS(ADC1);
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}
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}
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/****************************************************************
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* Serial Peripheral Interface (SPI) pins
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****************************************************************/
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void spi_set_mode(SPI_TypeDef *spi, uint8_t mode)
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{
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switch (mode) {
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case 0:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
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break;
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case 1:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
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break;
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case 2:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
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break;
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case 3:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
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break;
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default:
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shutdown("Invalid SPI mode");
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}
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}
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void spi_set_baudrate(SPI_TypeDef *spi, uint32_t rate)
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{
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const uint32_t pclk = __LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler());
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const uint32_t prescaler = pclk / rate;
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uint32_t setting = LL_SPI_BAUDRATEPRESCALER_DIV256;
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if (prescaler <= 2)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV2;
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else if (prescaler <= 4)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV4;
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else if (prescaler <= 8)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV8;
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else if (prescaler <= 16)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV16;
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else if (prescaler <= 32)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV32;
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else if (prescaler <= 64)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV64;
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else if (prescaler <= 128)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV128;
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LL_SPI_SetBaudRatePrescaler(spi, setting);
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}
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void spi_init_pins(void)
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{
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LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_13, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_14, LL_GPIO_MODE_INPUT);
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LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_15, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_13, LL_GPIO_OUTPUT_PUSHPULL);
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LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_14, LL_GPIO_PULL_UP);
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LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_15, LL_GPIO_OUTPUT_PUSHPULL);
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}
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struct spi_config
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spi_setup(uint32_t bus, uint8_t mode, uint32_t rate)
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{
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struct spi_config config;
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config.config = *SPI2;
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if (bus > 0 || !rate)
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shutdown("Invalid spi_setup parameters");
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spi_init_pins();
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spi_set_mode(&config.config, mode);
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spi_set_baudrate(&config.config, rate);
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return config;
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}
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void
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spi_prepare(struct spi_config config)
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{
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*SPI2 = config.config;
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LL_SPI_Enable(SPI2);
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}
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void
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spi_transfer(struct spi_config config, uint8_t receive_data,
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uint8_t len, uint8_t *data)
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{
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while (len--) {
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LL_SPI_TransmitData8(SPI2, *data);
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while (!LL_SPI_IsActiveFlag_TXE(SPI2));
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if (receive_data) {
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while (!LL_SPI_IsActiveFlag_RXNE(SPI2));
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*data = LL_SPI_ReceiveData8(SPI2);
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}
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data++;
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}
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while (LL_SPI_IsActiveFlag_BSY(SPI2));
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LL_SPI_Disable(SPI2);
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}
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@ -0,0 +1,11 @@
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#ifndef __STM32F1_INTERNAL_H
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#define __STM32F1_INTERNAL_H
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// Local definitions for STM32F1 code
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#define GPIO(PORT, NUM) (((PORT)-'A') * 16 + (NUM))
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#define GPIO2PORT(PIN) ((PIN) / 16)
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extern GPIO_TypeDef *const digital_regs[];
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extern uint32_t const digital_pins[];
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#endif // internal.h
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@ -0,0 +1,111 @@
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// SPI functions on STM32F1
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//
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// Copyright (C) 2018 Grigori Goronzy <greg@kinoho.net>
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//
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include "command.h" // shutdown
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#include "gpio.h" // spi_setup
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#include "sched.h" // sched_shutdown
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#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetPinMode
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#include "stm32f1xx_ll_rcc.h" // __LL_RCC_CALC_PCLK1_FREQ
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#include "stm32f1xx_ll_spi.h" // LL_SPI_Enable
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static void spi_set_mode(SPI_TypeDef *spi, uint8_t mode)
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{
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switch (mode) {
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case 0:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
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break;
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case 1:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
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break;
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case 2:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
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break;
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case 3:
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LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
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LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
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break;
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default:
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shutdown("Invalid SPI mode");
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}
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}
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static void spi_set_baudrate(SPI_TypeDef *spi, uint32_t rate)
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{
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const uint32_t pclk = __LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler());
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const uint32_t prescaler = pclk / rate;
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uint32_t setting = LL_SPI_BAUDRATEPRESCALER_DIV256;
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if (prescaler <= 2)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV2;
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else if (prescaler <= 4)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV4;
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else if (prescaler <= 8)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV8;
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else if (prescaler <= 16)
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setting = LL_SPI_BAUDRATEPRESCALER_DIV16;
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else if (prescaler <= 32)
|
||||
setting = LL_SPI_BAUDRATEPRESCALER_DIV32;
|
||||
else if (prescaler <= 64)
|
||||
setting = LL_SPI_BAUDRATEPRESCALER_DIV64;
|
||||
else if (prescaler <= 128)
|
||||
setting = LL_SPI_BAUDRATEPRESCALER_DIV128;
|
||||
|
||||
LL_SPI_SetBaudRatePrescaler(spi, setting);
|
||||
}
|
||||
|
||||
static void spi_init_pins(void)
|
||||
{
|
||||
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_13, LL_GPIO_MODE_ALTERNATE);
|
||||
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_14, LL_GPIO_MODE_INPUT);
|
||||
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_15, LL_GPIO_MODE_ALTERNATE);
|
||||
LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_13, LL_GPIO_OUTPUT_PUSHPULL);
|
||||
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_14, LL_GPIO_PULL_UP);
|
||||
LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_15, LL_GPIO_OUTPUT_PUSHPULL);
|
||||
}
|
||||
|
||||
struct spi_config
|
||||
spi_setup(uint32_t bus, uint8_t mode, uint32_t rate)
|
||||
{
|
||||
struct spi_config config;
|
||||
config.config = *SPI2;
|
||||
|
||||
if (bus > 0 || !rate)
|
||||
shutdown("Invalid spi_setup parameters");
|
||||
|
||||
spi_init_pins();
|
||||
spi_set_mode(&config.config, mode);
|
||||
spi_set_baudrate(&config.config, rate);
|
||||
|
||||
return config;
|
||||
}
|
||||
|
||||
void
|
||||
spi_prepare(struct spi_config config)
|
||||
{
|
||||
*SPI2 = config.config;
|
||||
LL_SPI_Enable(SPI2);
|
||||
}
|
||||
|
||||
void
|
||||
spi_transfer(struct spi_config config, uint8_t receive_data,
|
||||
uint8_t len, uint8_t *data)
|
||||
{
|
||||
while (len--) {
|
||||
LL_SPI_TransmitData8(SPI2, *data);
|
||||
while (!LL_SPI_IsActiveFlag_TXE(SPI2));
|
||||
if (receive_data) {
|
||||
while (!LL_SPI_IsActiveFlag_RXNE(SPI2));
|
||||
*data = LL_SPI_ReceiveData8(SPI2);
|
||||
}
|
||||
data++;
|
||||
}
|
||||
|
||||
while (LL_SPI_IsActiveFlag_BSY(SPI2));
|
||||
LL_SPI_Disable(SPI2);
|
||||
}
|
||||
Loading…
Reference in New Issue