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feat: Replies to pings (ignoring crc)

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This commit is contained in:
Diogo Diniz
2026-04-07 16:44:45 +01:00
parent e32700cc98
commit 3de4ab3af1
17 changed files with 338 additions and 85 deletions
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81
app/src/main.c
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@@ -7,94 +7,19 @@
#include "stm32f4xx_ll_i2c.h"
#include "incp_handler.h"
#include "msg_buf.h"
#define I2C_BUF_SIZE 512
uint8_t i2c_buf[I2C_BUF_SIZE];
#include "my_i2c.h"
#define MSG_BUF_CAPACITY (2*1024)
uint8_t i2c_msg_store[MSG_BUF_CAPACITY];
msg_buf_t i2c_msgs;
void I2C1_EV_IRQHandler()
{
if (!LL_I2C_IsActiveFlag_ADDR(I2C1))
Error_Handler();
//Skip checking matched addr (should only be one)
//Skip checking if receiving or transmitting (should always be false)
LL_I2C_ClearFlag_ADDR(I2C1);
int head = 0;
//Allow buffer to grow until full (and inclusive)
while (head <= I2C_BUF_SIZE)
{
//Wait for data or stop flag
while (!LL_I2C_IsActiveFlag_STOP(I2C1) && !LL_I2C_IsActiveFlag_RXNE(I2C1));
if (LL_I2C_IsActiveFlag_STOP(I2C1))
{
LL_I2C_ClearFlag_STOP(I2C1);
break;
}
else //Data received
{
if (head >= I2C_BUF_SIZE) //Overflow for sure
Error_Handler();
uint8_t data = LL_I2C_ReceiveData8(I2C1);
i2c_buf[head++] = data;
}
}
//Stop condition reached, save msg
msg_buf_push(&i2c_msgs, i2c_buf, head);
}
bool I2C1_transmit_master(uint8_t addr, uint8_t *buf, uint8_t count)
{
while (LL_I2C_IsActiveFlag_BUSY(I2C1));
//Transmit start
LL_I2C_GenerateStartCondition(I2C1);
while (!LL_I2C_IsActiveFlag_SB(I2C1));
//Transmit address + write
LL_I2C_TransmitData8(I2C1, addr << 1);
while (!LL_I2C_IsActiveFlag_ADDR(I2C1));
LL_I2C_ClearFlag_ADDR(I2C1);
for (int i = 0; i < count; ++i)
{
while (!LL_I2C_IsActiveFlag_TXE(I2C1));
if (LL_I2C_IsActiveFlag_AF(I2C1))
{
//REVIEW: Anything else neeeded?
LL_I2C_Disable(I2C1);
LL_I2C_Enable(I2C1);
return false;
}
LL_I2C_TransmitData8(I2C1, buf[i]);
}
LL_I2C_GenerateStopCondition(I2C1);
while (LL_I2C_IsActiveFlag_STOP(I2C1));
LL_I2C_Disable(I2C1);
LL_I2C_Enable(I2C1);
return true;
}
int my_main()
{
LL_I2C_EnableIT_EVT(I2C1);
msg_buf_init(&i2c_msgs, i2c_msg_store, sizeof(i2c_msg_store));
while (1)
{
HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
for (int i = 0; i < 500; ++i)
{
HAL_Delay(1);