uint8_t expander_read(uint8_t addr)
{
uint8_t ret = 0;
/* Create a i2c_msg buffer, that is used to put the controller into read
mode and then to read some data. */
struct i2c_msg msg_buf[] = {
{CORE_GPIO_EXPANDER_I2C_ADDRESS, I2C_M_WR, 1, &addr},
{CORE_GPIO_EXPANDER_I2C_ADDRESS, I2C_M_RD, 1, &ret}
};
qup_i2c_xfer(dev, msg_buf, 2);
return ret;
}
uint32_t eprom_read (uint16_t addr, uint8_t count) {
uint32_t ret = 0;
if(!dev){
return ret;
}
/* Create a i2c_msg buffer, that is used to put the controller into
* read mode and then to read some data.
*/
struct i2c_msg msg_buf[] = {
{EEPROM_I2C_ADDRESS, I2C_M_WR, 2, &addr},
{EEPROM_I2C_ADDRESS, I2C_M_RD, count, &ret}
};
qup_i2c_xfer(dev, msg_buf, 2);
return ret;
}
static int qrd_lcd_i2c_read(uint8_t addr)
{
int ret = 0;
/* Create a i2c_msg buffer, that is used to put the controller into read
mode and then to read some data. */
struct i2c_msg msg_buf[] = {
{QRD_LCD_I2C_ADDRESS, I2C_M_WR, 1, &addr},
{QRD_LCD_I2C_ADDRESS, I2C_M_RD, 1, &ret}
};
ret = qup_i2c_xfer(i2c_dev, msg_buf, 2);
if(ret < 0) {
dprintf(CRITICAL, "qup_i2c_xfer error %d\n", ret);
return ret;
}
return 0;
}
static int qrd_lcd_i2c_write(uint8_t addr, uint8_t val)
{
int ret = 0;
uint8_t data_buf[] = { addr, val };
/* Create a i2c_msg buffer, that is used to put the controller into write
mode and then to write some data. */
struct i2c_msg msg_buf[] = { {QRD_LCD_I2C_ADDRESS,
I2C_M_WR, 2, data_buf}
};
ret = qup_i2c_xfer(i2c_dev, msg_buf, 1);
if(ret < 0) {
dprintf(CRITICAL, "qup_i2c_xfer error %d\n", ret);
return ret;
}
return 0;
}
uint8_t expander_write(uint8_t addr, uint8_t val)
{
uint8_t data_buf[] = { addr, val };
/* Create a i2c_msg buffer, that is used to put the controller into write
mode and then to write some data. */
struct i2c_msg msg_buf[] = { {CORE_GPIO_EXPANDER_I2C_ADDRESS,
I2C_M_WR, 2, data_buf}
};
qup_i2c_xfer(dev, msg_buf, 1);
/* Double check that the write worked. */
if (val != expander_read(addr)) {
return -1;
}
return 0;
}
void eeprom_read_test()
{
struct qup_i2c_dev *dev;
char ret[100] = {'\0'};
dev = qup_blsp_i2c_init(BLSP_ID_2, QUP_ID_4, 100000, 19200000);
if (!dev) {
dprintf(CRITICAL, "Failed initializing I2c\n");
return;
}
/* Create a i2c_msg buffer, to read from eprom */
struct i2c_msg msg_buf[] = {
{EEPROM_HW_I2C_ADDRESS, I2C_M_RD, 100, ret}
};
qup_i2c_xfer(dev, msg_buf, 1);
}
