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Bitbang I2C setup + detect test

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This commit is contained in:
Ben V. Brown
2020-06-12 21:10:03 +10:00
parent 450ce17935
commit 34ae57ee58
15 changed files with 1435 additions and 1630 deletions
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232
workspace/TS100/Core/BSP/Miniware/I2CBB.cpp Normal file
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@@ -0,0 +1,232 @@
/*
* I2CBB.cpp
*
* Created on: 12 Jun 2020
* Author: Ralim
*/
#include <I2CBB.hpp>
#define SCL_HIGH() HAL_GPIO_WritePin(SCL2_GPIO_Port, SCL2_Pin, GPIO_PIN_SET)
#define SCL_LOW() HAL_GPIO_WritePin(SCL2_GPIO_Port, SCL2_Pin, GPIO_PIN_RESET)
#define SDA_HIGH() HAL_GPIO_WritePin(SDA2_GPIO_Port, SDA2_Pin, GPIO_PIN_SET)
#define SDA_LOW() HAL_GPIO_WritePin(SDA2_GPIO_Port, SDA2_Pin, GPIO_PIN_RESET)
#define SDA_READ() (HAL_GPIO_ReadPin(SDA2_GPIO_Port,SDA2_Pin)==GPIO_PIN_SET?1:0)
#define SCL_READ() (HAL_GPIO_ReadPin(SCL2_GPIO_Port,SCL2_Pin)==GPIO_PIN_SET?1:0)
#define I2C_DELAY() HAL_Delay(1);
void I2CBB::init() {
//Set GPIO's to output open drain
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
GPIO_InitStruct.Pin = SDA2_Pin | SCL2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(SDA2_GPIO_Port, &GPIO_InitStruct);
SDA_HIGH();
SCL_HIGH();
}
bool I2CBB::probe(uint8_t address) {
start();
bool ack = send(address);
stop();
return ack;
}
bool I2CBB::Mem_Read(uint16_t DevAddress, uint16_t MemAddress, uint8_t *pData,
uint16_t Size) {
start();
bool ack = send(DevAddress | 1);
if (!ack) {
stop();
return false;
}
ack = send(MemAddress);
if (!ack) {
stop();
return false;
}
while (Size) {
pData[0] = read(Size > 1);
pData++;
Size--;
}
stop();
return true;
}
bool I2CBB::Mem_Write(uint16_t DevAddress, uint16_t MemAddress, uint8_t *pData,
uint16_t Size) {
start();
bool ack = send(DevAddress);
if (!ack) {
stop();
return false;
}
ack = send(MemAddress);
if (!ack) {
stop();
return false;
}
while (Size) {
bool ack = send(pData[0]);
if (!ack) {
stop();
return false;
}
pData++;
Size--;
}
stop();
return true;
}
void I2CBB::Transmit(uint16_t DevAddress, uint8_t *pData, uint16_t Size) {
start();
bool ack = send(DevAddress);
if (!ack) {
stop();
return;
}
while (Size) {
bool ack = send(pData[0]);
if (!ack) {
stop();
return;
}
pData++;
Size--;
}
stop();
}
void I2CBB::Receive(uint16_t DevAddress, uint8_t *pData, uint16_t Size) {
start();
bool ack = send(DevAddress | 1);
if (!ack) {
stop();
return;
}
while (Size) {
pData[0] = read(Size > 1);
pData++;
Size--;
}
stop();
}
void I2CBB::TransmitReceive(uint16_t DevAddress, uint8_t *pData_tx,
uint16_t Size_tx, uint8_t *pData_rx, uint16_t Size_rx) {
if (Size_tx == 0 && Size_rx == 0)
return;
if (Size_tx) {
start();
bool ack = send(DevAddress);
if (!ack) {
stop();
return;
}
while (Size_tx) {
bool ack = send(pData_tx[0]);
if (!ack) {
stop();
return;
}
pData_tx++;
Size_tx--;
}
}
if (Size_rx) {
start();
bool ack = send(DevAddress | 1);
if (!ack) {
stop();
return;
}
while (Size_rx) {
pData_rx[0] = read(Size_rx > 1);
pData_rx++;
Size_rx--;
}
}
stop();
}
void I2CBB::start() {
/* I2C Start condition, data line goes low when clock is high */
SCL_HIGH();
SDA_HIGH();
I2C_DELAY();
SDA_LOW();
I2C_DELAY();
SCL_LOW();
I2C_DELAY();
}
void I2CBB::stop() {
/* I2C Stop condition, clock goes high when data is low */
SDA_LOW();
I2C_DELAY();
SCL_HIGH();
I2C_DELAY();
SDA_HIGH();
I2C_DELAY();
}
bool I2CBB::send(uint8_t value) {
for (uint8_t i = 0; i < 8; i++) {
write_bit(value & 0x80); // write the most-significant bit
value <<= 1;
}
bool ack = read_bit()==0;
return ack;
}
uint8_t I2CBB::read(bool ack) {
uint8_t B = 0;
uint8_t i;
for (i = 0; i < 8; i++) {
B <<= 1;
B |= read_bit();
}
if (ack)
write_bit(0);
else
write_bit(1);
return B;
}
uint8_t I2CBB::read_bit() {
uint8_t b;
SDA_HIGH();
I2C_DELAY();
SCL_HIGH();
I2C_DELAY();
if (SDA_READ())
b = 1;
else
b = 0;
SCL_LOW();
return b;
}
void I2CBB::write_bit(uint8_t val) {
if (val > 0)
SDA_HIGH();
else
SDA_LOW();
I2C_DELAY();
SCL_HIGH();
I2C_DELAY();
SCL_LOW();
}

42
workspace/TS100/Core/BSP/Miniware/I2CBB.hpp Normal file
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@@ -0,0 +1,42 @@
/*
* I2CBB.hpp
*
* Created on: 12 Jun 2020
* Author: Ralim
*/
#ifndef BSP_MINIWARE_I2CBB_HPP_
#define BSP_MINIWARE_I2CBB_HPP_
#include "BSP.h"
#include "Setup.h"
#include "Pins.h"
/*
* Simple static I2C bit-bang class used on the TS80P
* SCL = PA5
* SDA = PA1
*/
class I2CBB {
public:
static void init();
//Probe if device ACK's address or not
static bool probe(uint8_t address);
//Issues a complete 8bit register read
static bool Mem_Read(uint16_t DevAddress, uint16_t MemAddress,
uint8_t *pData, uint16_t Size);
//Implements a register write
static bool Mem_Write(uint16_t DevAddress, uint16_t MemAddress,
uint8_t *pData, uint16_t Size);
static void Transmit(uint16_t DevAddress, uint8_t *pData, uint16_t Size);
static void Receive(uint16_t DevAddress, uint8_t *pData, uint16_t Size);
static void TransmitReceive(uint16_t DevAddress, uint8_t *pData_tx,
uint16_t Size_tx, uint8_t *pData_rx, uint16_t Size_rx);
private:
static void start();
static void stop();
static bool send(uint8_t value);
static uint8_t read(bool ack);
static uint8_t read_bit();
static void write_bit(uint8_t val);
};
#endif /* BSP_MINIWARE_I2CBB_HPP_ */

4
workspace/TS100/Core/BSP/Miniware/Pins.h
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@@ -77,6 +77,10 @@
#define SCL_GPIO_Port GPIOB
#define SDA_Pin GPIO_PIN_7
#define SDA_GPIO_Port GPIOB
#define SCL2_Pin GPIO_PIN_5
#define SCL2_GPIO_Port GPIOA
#define SDA2_Pin GPIO_PIN_1
#define SDA2_GPIO_Port GPIOA
#endif

13
workspace/TS100/Core/BSP/Miniware/Power.cpp
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@@ -2,10 +2,14 @@
#include "BSP_Power.h"
#include "QC3.h"
#include "Settings.h"
#include "FUSB302.h"
bool FUSB302_present = false;
void power_probe() {
// If TS80 probe for QC
// If TS100 - noop
#ifdef MODEL_TS80
startQC(systemSettings.voltageDiv);
seekQC((systemSettings.cutoutSetting) ? 120 : 90,
@@ -18,4 +22,11 @@ void power_check() {
#ifdef MODEL_TS80
QC_resync();
#endif
}
}
uint8_t usb_pd_detect(){
#ifdef MODEL_TS80
FUSB302_present=fusb302_detect();
return FUSB302_present;
#endif
return false;
}

3
workspace/TS100/Core/BSP/Miniware/preRTOS.cpp
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@@ -9,6 +9,7 @@
#include "BSP.h"
#include "Setup.h"
#include "Pins.h"
#include "I2CBB.hpp"
void preRToSInit() {
/* Reset of all peripherals, Initializes the Flash interface and the Systick.
*/
@@ -18,5 +19,5 @@ void preRToSInit() {
HAL_Delay(50);
HAL_GPIO_WritePin(OLED_RESET_GPIO_Port, OLED_RESET_Pin, GPIO_PIN_SET);
HAL_Delay(50);
I2CBB::init();
}