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This commit is contained in:
Martin Budden 2016-06-27 19:26:02 +01:00
parent 3b19b01c78
commit 97fe5afd6c
57 changed files with 575 additions and 575 deletions
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310
src/main/drivers/bus_i2c_soft.c
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@ -48,218 +48,218 @@ static volatile uint16_t i2cErrorCount = 0;
static void I2C_delay(void)
{
volatile int i = 7;
while (i) {
i--;
}
volatile int i = 7;
while (i) {
i--;
}
}
static bool I2C_Start(void)
{
SDA_H;
SCL_H;
I2C_delay();
if (!SDA_read) {
return false;
}
SDA_L;
I2C_delay();
if (SDA_read) {
return false;
}
SDA_L;
I2C_delay();
return true;
SDA_H;
SCL_H;
I2C_delay();
if (!SDA_read) {
return false;
}
SDA_L;
I2C_delay();
if (SDA_read) {
return false;
}
SDA_L;
I2C_delay();
return true;
}
static void I2C_Stop(void)
{
SCL_L;
I2C_delay();
SDA_L;
I2C_delay();
SCL_H;
I2C_delay();
SDA_H;
I2C_delay();
SCL_L;
I2C_delay();
SDA_L;
I2C_delay();
SCL_H;
I2C_delay();
SDA_H;
I2C_delay();
}
static void I2C_Ack(void)
{
SCL_L;
I2C_delay();
SDA_L;
I2C_delay();
SCL_H;
I2C_delay();
SCL_L;
I2C_delay();
SCL_L;
I2C_delay();
SDA_L;
I2C_delay();
SCL_H;
I2C_delay();
SCL_L;
I2C_delay();
}
static void I2C_NoAck(void)
{
SCL_L;
I2C_delay();
SDA_H;
I2C_delay();
SCL_H;
I2C_delay();
SCL_L;
I2C_delay();
SCL_L;
I2C_delay();
SDA_H;
I2C_delay();
SCL_H;
I2C_delay();
SCL_L;
I2C_delay();
}
static bool I2C_WaitAck(void)
{
SCL_L;
I2C_delay();
SDA_H;
I2C_delay();
SCL_H;
I2C_delay();
if (SDA_read) {
SCL_L;
return false;
}
SCL_L;
return true;
SCL_L;
I2C_delay();
SDA_H;
I2C_delay();
SCL_H;
I2C_delay();
if (SDA_read) {
SCL_L;
return false;
}
SCL_L;
return true;
}
static void I2C_SendByte(uint8_t byte)
{
uint8_t i = 8;
while (i--) {
SCL_L;
I2C_delay();
if (byte & 0x80) {
SDA_H;
}
else {
SDA_L;
}
byte <<= 1;
I2C_delay();
SCL_H;
I2C_delay();
}
SCL_L;
uint8_t i = 8;
while (i--) {
SCL_L;
I2C_delay();
if (byte & 0x80) {
SDA_H;
}
else {
SDA_L;
}
byte <<= 1;
I2C_delay();
SCL_H;
I2C_delay();
}
SCL_L;
}
static uint8_t I2C_ReceiveByte(void)
{
uint8_t i = 8;
uint8_t byte = 0;
uint8_t i = 8;
uint8_t byte = 0;
SDA_H;
while (i--) {
byte <<= 1;
SCL_L;
I2C_delay();
SCL_H;
I2C_delay();
if (SDA_read) {
byte |= 0x01;
}
}
SCL_L;
return byte;
SDA_H;
while (i--) {
byte <<= 1;
SCL_L;
I2C_delay();
SCL_H;
I2C_delay();
if (SDA_read) {
byte |= 0x01;
}
}
SCL_L;
return byte;
}
void i2cInit(I2CDevice device)
{
UNUSED(device);
UNUSED(device);
scl = IOGetByTag(IO_TAG(SOFT_I2C_SCL));
sda = IOGetByTag(IO_TAG(SOFT_I2C_SDA));
scl = IOGetByTag(IO_TAG(SOFT_I2C_SCL));
sda = IOGetByTag(IO_TAG(SOFT_I2C_SDA));
IOConfigGPIO(scl, IOCFG_OUT_OD);
IOConfigGPIO(sda, IOCFG_OUT_OD);
IOConfigGPIO(scl, IOCFG_OUT_OD);
IOConfigGPIO(sda, IOCFG_OUT_OD);
}
bool i2cWriteBuffer(I2CDevice device, uint8_t addr, uint8_t reg, uint8_t len, uint8_t * data)
{
UNUSED(device);
int i;
if (!I2C_Start()) {
i2cErrorCount++;
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
for (i = 0; i < len; i++) {
I2C_SendByte(data[i]);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
}
I2C_Stop();
return true;
int i;
if (!I2C_Start()) {
i2cErrorCount++;
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
for (i = 0; i < len; i++) {
I2C_SendByte(data[i]);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
}
I2C_Stop();
return true;
}
bool i2cWrite(I2CDevice device, uint8_t addr, uint8_t reg, uint8_t data)
{
UNUSED(device);
if (!I2C_Start()) {
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
I2C_SendByte(data);
I2C_WaitAck();
I2C_Stop();
return true;
if (!I2C_Start()) {
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
I2C_SendByte(data);
I2C_WaitAck();
I2C_Stop();
return true;
}
bool i2cRead(I2CDevice device, uint8_t addr, uint8_t reg, uint8_t len, uint8_t *buf)
{
UNUSED(device);
if (!I2C_Start()) {
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
I2C_Start();
I2C_SendByte(addr << 1 | I2C_Direction_Receiver);
I2C_WaitAck();
while (len) {
*buf = I2C_ReceiveByte();
if (len == 1) {
I2C_NoAck();
}
else {
I2C_Ack();
}
buf++;
len--;
}
I2C_Stop();
return true;
if (!I2C_Start()) {
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
I2C_Start();
I2C_SendByte(addr << 1 | I2C_Direction_Receiver);
I2C_WaitAck();
while (len) {
*buf = I2C_ReceiveByte();
if (len == 1) {
I2C_NoAck();
}
else {
I2C_Ack();
}
buf++;
len--;
}
I2C_Stop();
return true;
}
uint16_t i2cGetErrorCounter(void)
{
return i2cErrorCount;
return i2cErrorCount;
}
#endif