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-rw-r--r--tests/i2c-master/i2c-master.c56
1 files changed, 32 insertions, 24 deletions
diff --git a/tests/i2c-master/i2c-master.c b/tests/i2c-master/i2c-master.c
index ec6404f..a7308b7 100644
--- a/tests/i2c-master/i2c-master.c
+++ b/tests/i2c-master/i2c-master.c
@@ -117,7 +117,11 @@ void i2c_transfer7(uint32_t i2c, uint8_t addr, uint8_t *w, size_t wn, uint8_t *r
i2c_set_7bit_address(i2c, addr);
i2c_set_write_transfer_dir(i2c);
i2c_set_bytes_to_transfer(i2c, wn);
- i2c_disable_autoend(i2c);
+ if (rn) {
+ i2c_disable_autoend(i2c);
+ } else {
+ i2c_enable_autoend(i2c);
+ }
i2c_send_start(i2c);
while (wn--) {
@@ -133,7 +137,9 @@ void i2c_transfer7(uint32_t i2c, uint8_t addr, uint8_t *w, size_t wn, uint8_t *r
/* not entirely sure this is really necessary.
* RM implies it will stall until it can write out the later bits
*/
- while (!i2c_transfer_complete(i2c));
+ if (rn) {
+ while (!i2c_transfer_complete(i2c));
+ }
}
if (rn) {
@@ -335,36 +341,38 @@ static float sht21_convert_humi(uint16_t raw)
return tf;
}
-#if 0
static float sht21_read_temp_hold(uint32_t i2c)
{
- // gpio_set(LED_DISCO_BLUE_PORT, LED_DISCO_BLUE_PIN);
- sht21_send_cmd(i2c, SHT21_CMD_TEMP_HOLD);
-
uint8_t data[3];
+#if 0
+ sht21_send_cmd(i2c, SHT21_CMD_TEMP_HOLD);
sht21_readn(i2c, 2, data);
+#endif
+ uint8_t cmd = SHT21_CMD_TEMP_HOLD;
+ i2c_transfer7(i2c, SENSOR_ADDRESS, &cmd, 1, data, sizeof(data));
uint8_t crc = data[2];
uint16_t temp = data[0] << 8 | data[1];
+ // TODO - calcualte CRC and check!
printf("CRC=%#x, data0=%#x, data1=%#x\n", crc, data[0], data[1]);
- // gpio_clear(LED_DISCO_BLUE_PORT, LED_DISCO_BLUE_PIN);
return sht21_convert_temp(temp);
}
static float sht21_read_humi_hold(uint32_t i2c)
{
- // gpio_set(LED_DISCO_BLUE_PORT, LED_DISCO_BLUE_PIN);
- sht21_send_cmd(i2c, SHT21_CMD_HUMIDITY_HOLD);
-
uint8_t data[3];
+#if 0
+ sht21_send_cmd(i2c, SHT21_CMD_HUMIDITY_HOLD);
sht21_readn(i2c, 2, data);
+#endif
+ uint8_t cmd = SHT21_CMD_HUMIDITY_HOLD;
+ i2c_transfer7(i2c, SENSOR_ADDRESS, &cmd, 1, data, sizeof(data));
+
uint8_t crc = data[2];
uint16_t left = data[0] << 8 | data[1];
+ // TODO - calcualte CRC and check!
printf("CRC=%#x, data0=%#x, data1=%#x\n", crc, data[0], data[1]);
-
- // gpio_clear(LED_DISCO_BLUE_PORT, LED_DISCO_BLUE_PIN);
return sht21_convert_humi(left);
}
-#endif
static void sht21_readid(void)
{
@@ -373,12 +381,14 @@ static void sht21_readid(void)
sht21_send_cmd(I2C1, SHT21_CMD_READ_REG);
sht21_readn(I2C1, 1, &raw);
#else
- //read_i2c(hw_details.periph, SENSOR_ADDRESS, SHT21_CMD_READ_REG, 1, &raw);
uint8_t cmd = SHT21_CMD_READ_REG;
-// i2c_write_bytes7(hw_details.periph, SENSOR_ADDRESS, &cmd, 1, false);
-// i2c_read_bytes7(hw_details.periph, SENSOR_ADDRESS, &raw, 1, true);
+ printf("RP...");
i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, &cmd, 1, &raw, 1);
- //read_i2c(hw_details.periph, SENSOR_ADDRESS, SHT21_CMD_READ_REG, 1, &raw);
+ printf("..S/S\n");
+ // or, with stop/start
+ i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, &cmd, 1, 0, 0);
+ i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, 0, 0, &raw, 1);
+
#endif
printf("raw user reg = %#x\n", raw);
int resolution = ((raw & 0x80) >> 6) | (raw & 1);
@@ -391,15 +401,11 @@ static void sht21_readid(void)
// sht21_send_data(I2C1, 2, req1);
// sht21_readn(I2C1, sizeof(res), res);
i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, req1, sizeof(req1), res, 8);
-// i2c_write_bytes7(hw_details.periph, SENSOR_ADDRESS, req1, 2, false);
-// i2c_read_bytes7(hw_details.periph, SENSOR_ADDRESS, res, 8, true);
uint8_t req2[] = {0xfc, 0xc9};
uint8_t res2[8];
// sht21_send_data(I2C1, 2, req2);
// sht21_readn(I2C1, sizeof(res), res2);
i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, req1, sizeof(req1), res2, 8);
-// i2c_write_bytes7(hw_details.periph, SENSOR_ADDRESS, req2, 2, false);
-// i2c_read_bytes7(hw_details.periph, SENSOR_ADDRESS, res2, 8, true);
printf("Serial = %02x%02x %02x%02x %02x%02x %02x%02x\n",
res2[3], res2[4], res[0], res[2], res[4], res[6], res2[0], res2[1]);
@@ -407,11 +413,13 @@ static void sht21_readid(void)
void i2cm_task(void)
{
+ static int i = 1;
+ printf("Starting iteration %d\n", i++);
gpio_set(hw_details.trigger_port, hw_details.trigger_pin);
sht21_readid();
-// float temp = sht21_read_temp_hold(I2C1);
-// float humi = sht21_read_humi_hold(I2C1);
+ float temp = sht21_read_temp_hold(hw_details.periph);
+ float humi = sht21_read_humi_hold(hw_details.periph);
gpio_clear(hw_details.trigger_port, hw_details.trigger_pin);
-// printf("Temp: %f C, RH: %f\n", temp, humi);
+ printf("Temp: %f C, RH: %f\n", temp, humi);
} \ No newline at end of file