Superminaren/MMDVM
1
0
Fork 0
mirror of https://github.com/g4klx/MMDVM.git synced 2026-10-23 19:15:00 +02:00
Code Issues Packages Projects Releases Wiki Activity

Most of the I2C work completed, now need to review the low-level I2C code.

Browse Source
This commit is contained in:
Jonathan Naylor
2020-11-23 14:24:14 +00:00
parent 112a136060
commit 6c8cf7a838
10 changed files with 133 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
I2CPort.cpp
+115
View File
@@ -1,3 +1,4 @@
/*
* Copyright (C) 2020 by Jonathan Naylor G4KLX
*
@@ -30,9 +31,54 @@
#include "stm32f7xx_i2c.h"
#endif
#include "Globals.h"
const uint32_t I2C_CLK_FREQ = 100000U; // XXX FIXME
const uint16_t I2C_ADDR = 0U; // XXX FIXME
extern "C" {
#if defined(I2C_REPEATER)
void I2C1_EV_IRQHandler(void)
{
i2C1.eventHandler();
}
void I2C1_ER_IRQHandler(void)
{
if (I2C_GetITStatus(I2C1, I2C_IT_AF))
I2C_ClearITPendingBit(I2C1, I2C_IT_AF);
}
#endif
#ifdef notdef
void I2C2_EV_IRQHandler(void)
{
i2C2.eventHandler();
}
void I2C2_ER_IRQHandler(void)
{
if (I2C_GetITStatus(I2C2, I2C_IT_AF))
I2C_ClearITPendingBit(I2C2, I2C_IT_AF);
}
#endif
#if defined(MODE_OLED)
void I2C3_EV_IRQHandler(void)
{
i2C3.eventHandler();
}
void I2C3_ER_IRQHandler(void)
{
if (I2C_GetITStatus(I2C3, I2C_IT_AF))
I2C_ClearITPendingBit(I2C3, I2C_IT_AF);
}
#endif
}
CI2CPort::CI2CPort(uint8_t n) :
m_n(n),
m_ok(false),
@@ -129,6 +175,75 @@ uint8_t CI2CPort::write(const uint8_t* data, uint8_t length)
return 0U;
}
void CI2CPort::eventHandler()
{
I2C_TypeDef* i2CPort = NULL;
switch (m_n) {
case 1U:
i2CPort = I2C1;
break;
case 2U:
i2CPort = I2C2;
break;
case 3U:
i2CPort = I2C3;
break;
default:
return;
}
uint32_t event = I2C_GetLastEvent(i2CPort);
switch (event) {
case I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED:
case I2C_EVENT_SLAVE_BYTE_TRANSMITTED:
if (fifoLevel() > 0U) {
I2C_SendData(i2CPort, m_fifo[m_fifoTail]);
m_fifoTail++;
if (m_fifoTail >= I2C_TX_FIFO_SIZE)
m_fifoTail = 0U;
} else
I2C_SendData(i2CPort, 0U);
break;
case I2C_EVENT_SLAVE_STOP_DETECTED:
clearFlag();
break;
}
}
void CI2CPort::clearFlag()
{
I2C_TypeDef* i2CPort = NULL;
switch (m_n) {
case 1U:
i2CPort = I2C1;
break;
case 2U:
i2CPort = I2C2;
break;
case 3U:
i2CPort = I2C3;
break;
default:
return;
}
// Clear ADDR flag
while((i2CPort->SR1 & I2C_SR1_ADDR) == I2C_SR1_ADDR) {
i2CPort->SR1;
i2CPort->SR2;
}
// Clear STOPF flag
while((i2CPort->SR1 & I2C_SR1_STOPF) == I2C_SR1_STOPF) {
i2CPort->SR1;
i2CPort->CR1 |= 0x1;
}
}
uint16_t CI2CPort::fifoLevel()
{
uint32_t tail = m_fifoTail;