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beepberry-rp2040
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Recover from TX_ABRT

This commit is contained in:
Damien Tournoud 2023-12-30 11:01:35 -08:00
parent 314c60c109
commit 7c5d0a7c79
1 changed files with 14 additions and 3 deletions
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17
app/puppet_i2c.c
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@ -5,6 +5,7 @@
#include <hardware/i2c.h>
#include <hardware/irq.h>
#include <pico/stdlib.h>
#include <stdio.h>
#define REG_ID_INVALID 0x00
@ -26,8 +27,18 @@ static struct
static void irq_handler(void)
{
uint32_t intr_stat = self.i2c->hw->intr_stat;
if (intr_stat == 0) {
return;
}
if (intr_stat & I2C_IC_INTR_STAT_R_TX_ABRT_BITS) {
printf("Recovering from TX_ABRT (reason=%x)\r\n", self.i2c->hw->tx_abrt_source);
self.i2c->hw->clr_tx_abrt;
}
// the controller sent data
if (self.i2c->hw->intr_stat & I2C_IC_INTR_MASK_M_RX_FULL_BITS) {
if (intr_stat & I2C_IC_INTR_MASK_M_RX_FULL_BITS) {
if (self.read_buffer.reg == REG_ID_INVALID) {
self.read_buffer.reg = self.i2c->hw->data_cmd & 0xff;
@ -48,7 +59,7 @@ static void irq_handler(void)
}
// the controller requested a read
if (self.i2c->hw->intr_stat & I2C_IC_INTR_MASK_M_RD_REQ_BITS) {
if (intr_stat & I2C_IC_INTR_MASK_M_RD_REQ_BITS) {
i2c_write_raw_blocking(self.i2c, self.write_buffer, self.write_len);
self.i2c->hw->clr_rd_req;
@ -76,7 +87,7 @@ void puppet_i2c_init(void)
gpio_pull_up(PIN_PUPPET_SCL);
// irq when the controller sends data, and when it requests a read
self.i2c->hw->intr_mask = I2C_IC_INTR_MASK_M_RD_REQ_BITS | I2C_IC_INTR_MASK_M_RX_FULL_BITS;
self.i2c->hw->intr_mask = I2C_IC_INTR_MASK_M_RD_REQ_BITS | I2C_IC_INTR_MASK_M_RX_FULL_BITS | I2C_IC_INTR_STAT_R_TX_ABRT_BITS;
const int irq = I2C0_IRQ + i2c_hw_index(self.i2c);
irq_set_exclusive_handler(irq, irq_handler);