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Beginnings of I2C object functions

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This commit is contained in:
Ea-r-th
2025-09-14 17:27:59 -07:00
parent 914fbf5a17
commit 183be36c64
4 changed files with 71 additions and 2 deletions
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35
SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_REG_F072xB.h
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@@ -40,7 +40,7 @@ constexpr SHAL_I2C_Pair getI2CPair(const I2C_Pair pair){
__builtin_unreachable();
}
constexpr SHAL_I2C_Enable_REG getI2CEnableReg(const I2C_Pair pair){
constexpr SHAL_I2C_Enable_Reg getI2CEnableReg(const I2C_Pair pair){
switch(pair){
case I2C_Pair::SCL1B6_SDA1B7:
case I2C_Pair::SCL1B8_SDA1B9:
@@ -56,4 +56,37 @@ constexpr SHAL_I2C_Enable_REG getI2CEnableReg(const I2C_Pair pair){
__builtin_unreachable();
}
constexpr SHAL_I2C_Reset_Reg getI2CResetReg(const I2C_Pair pair){
switch(pair){
case I2C_Pair::SCL1B6_SDA1B7:
case I2C_Pair::SCL1B8_SDA1B9:
return {&RCC->APB1RSTR,RCC_APB1RSTR_I2C1RST};
case I2C_Pair::SCL2B10_SDA2B11:
case I2C_Pair::SCL2B13_SDA2B14:
return {&RCC->APB1RSTR,RCC_APB1RSTR_I2C2RST};
case I2C_Pair::NUM_PAIRS:
case I2C_Pair::INVALID:
assert(false);
return {nullptr, 0};
}
__builtin_unreachable();
}
//Gets all the bits in the I2C timer register, these values should rarely be manually set, but I wanted to support it anyway
constexpr SHAL_I2C_Timing_Reg getI2CTimerReg(const I2C_Pair pair){
switch(pair){
case I2C_Pair::SCL1B6_SDA1B7:
case I2C_Pair::SCL1B8_SDA1B9:
return {&I2C1->TIMINGR,31,4,23,4,19,4,15,8,7,0};
case I2C_Pair::SCL2B10_SDA2B11:
case I2C_Pair::SCL2B13_SDA2B14:
return {&I2C2->TIMINGR,31,4,23,4,19,4,15,8,7,0};
case I2C_Pair::NUM_PAIRS:
case I2C_Pair::INVALID:
assert(false);
__builtin_unreachable();
}
__builtin_unreachable();
}
#endif //SHAL_I2C_REG_F072XB_H

22
SHAL/Include/Peripheral/I2C/Reg/SHAL_I2C_TYPES.h
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@@ -17,9 +17,29 @@ struct SHAL_I2C_Pair {
GPIO_Alternate_Function SDA_Mask;
};
struct SHAL_I2C_Enable_REG{
struct SHAL_I2C_Enable_Reg{
volatile uint32_t* reg;
uint32_t mask;
};
struct SHAL_I2C_Reset_Reg{
volatile uint32_t* reg;
uint32_t mask;
};
//Manual values for I2C timer register
struct SHAL_I2C_Timing_Reg{
volatile uint32_t* reg;
uint8_t prescaler_offset;
uint8_t prescaler_width;
uint8_t dataSetupTime_offset;
uint8_t dataSetupTime_width;
uint8_t dataHoldTime_offset;
uint8_t dataHoldTime_width;
uint8_t SCLHighPeriod_offset;
uint8_t SCLHighPeriod_width;
uint8_t SCLLowPeriod_offset;
uint8_t SCLLowPeriod_width;
};
#endif //SHMINGO_HAL_SHAL_I2C_TYPES_H

10
SHAL/Include/Peripheral/I2C/SHAL_I2C.h
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@@ -15,6 +15,16 @@ class SHAL_I2C{
public:
void init(I2C_Pair pair) volatile;
void masterTransmit();
//Manually set the clock configuration. Refer to your MCU's reference manual for examples
void setClockConfig(uint8_t prescaler, uint8_t dataSetupTime, uint8_t dataHoldTime, uint8_t SCLHighPeriod, uint8_t SCLLowPeriod);
//Set clock configuration based on a value calculated from STM32CubeMX, or other similar tools
void setClockConfig(uint32_t configuration);
private:
SHAL_I2C() = default;

6
SHAL/Src/Peripheral/I2C/SHAL_I2C.cpp
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@@ -2,3 +2,9 @@
// Created by Luca on 9/9/2025.
//
#include "SHAL_I2C.h"
void SHAL_I2C::init() volatile {
}