diff options
Diffstat (limited to 'tests/i2c-master')
| -rw-r--r-- | tests/i2c-master/i2c-master.c | 56 |
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); }
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