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stm32: Simplify fdcan tx irq handling 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2022-06-10 23:27:53 -04:00
parent 84d798f516
commit ce186c6af6
1 changed files with 4 additions and 8 deletions
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12
src/stm32/fdcan.c
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@ -88,13 +88,9 @@ int
canbus_send(struct canbus_msg *msg) canbus_send(struct canbus_msg *msg)
{ {
uint32_t txfqs = SOC_CAN->TXFQS; uint32_t txfqs = SOC_CAN->TXFQS;
if (txfqs & FDCAN_TXFQS_TFQF) { if (txfqs & FDCAN_TXFQS_TFQF)
// No space in transmit fifo - enable tx irq // No space in transmit fifo - wait for irq
irq_disable();
SOC_CAN->IE |= FDCAN_IE_TC;
irq_enable();
return -1; return -1;
}
uint32_t w_index = ((txfqs & FDCAN_TXFQS_TFQPI) >> FDCAN_TXFQS_TFQPI_Pos); uint32_t w_index = ((txfqs & FDCAN_TXFQS_TFQPI) >> FDCAN_TXFQS_TFQPI_Pos);
FDCAN_TX_FIFO_TypeDef *txfifo = &MSG_RAM.TXFIFO[w_index]; FDCAN_TX_FIFO_TypeDef *txfifo = &MSG_RAM.TXFIFO[w_index];
@ -143,7 +139,7 @@ canbus_set_filter(uint32_t id)
void void
CAN_IRQHandler(void) CAN_IRQHandler(void)
{ {
uint32_t ir = SOC_CAN->IR & SOC_CAN->IE; uint32_t ir = SOC_CAN->IR;
if (ir & FDCAN_IE_RF0NE) { if (ir & FDCAN_IE_RF0NE) {
SOC_CAN->IR = FDCAN_IE_RF0NE; SOC_CAN->IR = FDCAN_IE_RF0NE;
@ -262,7 +258,7 @@ can_init(void)
/*##-3- Configure Interrupts #################################*/ /*##-3- Configure Interrupts #################################*/
armcm_enable_irq(CAN_IRQHandler, CAN_IT0_IRQn, 0); armcm_enable_irq(CAN_IRQHandler, CAN_IT0_IRQn, 0);
SOC_CAN->ILE = FDCAN_ILE_EINT0; SOC_CAN->ILE = FDCAN_ILE_EINT0;
SOC_CAN->IE = FDCAN_IE_RF0NE; SOC_CAN->IE = FDCAN_IE_RF0NE | FDCAN_IE_TC;
// Convert unique 96-bit chip id into 48 bit representation // Convert unique 96-bit chip id into 48 bit representation
uint64_t hash = fasthash64((uint8_t*)UID_BASE, 12, 0xA16231A7); uint64_t hash = fasthash64((uint8_t*)UID_BASE, 12, 0xA16231A7);