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lpc176x: Use enumerations for buses and reserve pins 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-04-01 00:11:23 -04:00
parent bc9fd03dab
commit 3e71a57f67
4 changed files with 18 additions and 7 deletions
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5
src/lpc176x/i2c.c
View File

@ -11,6 +11,9 @@
#include "internal.h" // gpio_peripheral
#include "sched.h" // sched_shutdown
DECL_ENUMERATION("i2c_bus", "i2c1", 0);
DECL_CONSTANT_STR("BUS_PINS_i2c1", "P0.1,P0.0");
// i2c connection status flags
enum {
IF_START = 1<<5, IF_STOP = 1<<4, IF_IRQ = 1<<3, IF_ACK = 1<<2, IF_ENA = 1<<6
@ -25,8 +28,8 @@ i2c_init(void)
have_run_init = 1;
// Init i2c bus 1 pins
gpio_peripheral(GPIO(0, 0), 3, 0);
gpio_peripheral(GPIO(0, 1), 3, 0);
gpio_peripheral(GPIO(0, 0), 3, 0);
// Set 100Khz frequency
enable_pclock(PCLK_I2C1);

5
src/lpc176x/serial.c
View File

@ -8,9 +8,12 @@
#include "autoconf.h" // CONFIG_SERIAL_BAUD
#include "board/irq.h" // irq_save
#include "board/serial_irq.h" // serial_rx_data
#include "command.h" // DECL_CONSTANT_STR
#include "internal.h" // gpio_peripheral
#include "sched.h" // DECL_INIT
DECL_CONSTANT_STR("RESERVE_PINS_serial", "P0.3,P0.2");
void
serial_init(void)
{
@ -27,8 +30,8 @@ serial_init(void)
LPC_UART0->FCR = 0x01;
// Setup pins
gpio_peripheral(GPIO(0, 2), 1, 0);
gpio_peripheral(GPIO(0, 3), 1, 0);
gpio_peripheral(GPIO(0, 2), 1, 0);
// Enable receive irq
NVIC_SetPriority(UART0_IRQn, 0);

7
src/lpc176x/spi.c
View File

@ -10,6 +10,9 @@
#include "internal.h" // gpio_peripheral
#include "sched.h" // sched_shutdown
DECL_ENUMERATION("spi_bus", "ssp0", 0);
DECL_CONSTANT_STR("BUS_PINS_ssp0", "P0.17,P0.18,P0.15");
static void
spi_init(void)
{
@ -18,10 +21,10 @@ spi_init(void)
return;
have_run_init = 1;
// Configure SCK0, MISO0, MOSI0 pins
gpio_peripheral(GPIO(0, 15), 2, 0);
// Configure MISO0, MOSI0, SCK0 pins
gpio_peripheral(GPIO(0, 17), 2, 0);
gpio_peripheral(GPIO(0, 18), 2, 0);
gpio_peripheral(GPIO(0, 15), 2, 0);
// Setup clock
enable_pclock(PCLK_SSP0);

8
src/lpc176x/usbserial.c
View File

@ -10,7 +10,7 @@
#include "board/irq.h" // irq_disable
#include "board/misc.h" // timer_read_time
#include "byteorder.h" // cpu_to_le32
#include "command.h" // output
#include "command.h" // DECL_CONSTANT_STR
#include "generic/usb_cdc.h" // usb_notify_ep0
#include "internal.h" // gpio_peripheral
#include "sched.h" // DECL_INIT
@ -261,6 +261,8 @@ usb_request_bootloader(void)
NVIC_SystemReset();
}
DECL_CONSTANT_STR("RESERVE_PINS_USB", "P0.30,P0.29,P2.9");
void
usbserial_init(void)
{
@ -271,9 +273,9 @@ usbserial_init(void)
LPC_USB->USBClkCtrl = 0x12;
while (LPC_USB->USBClkSt != 0x12)
;
// configure USBD+, USBD-, and USB Connect pins
gpio_peripheral(GPIO(0, 29), 1, 0);
// configure USBD-, USBD+, and USB Connect pins
gpio_peripheral(GPIO(0, 30), 1, 0);
gpio_peripheral(GPIO(0, 29), 1, 0);
gpio_peripheral(GPIO(2, 9), 1, 0);
// setup endpoints
realize_endpoint(EP0OUT, USB_CDC_EP0_SIZE);