From 6df66b77ba5b27bce5630694742f2dac57b8d3eb Mon Sep 17 00:00:00 2001 From: jaseg Date: Tue, 17 Jul 2018 15:43:26 +0200 Subject: Isolate usb-serial-rs485 tree --- tests/i2c-master/i2c-master.c | 121 ------------------------------------------ 1 file changed, 121 deletions(-) delete mode 100644 tests/i2c-master/i2c-master.c (limited to 'tests/i2c-master/i2c-master.c') diff --git a/tests/i2c-master/i2c-master.c b/tests/i2c-master/i2c-master.c deleted file mode 100644 index 3adbbf0..0000000 --- a/tests/i2c-master/i2c-master.c +++ /dev/null @@ -1,121 +0,0 @@ -/* - * Feb 2017, Karl Palsson - */ - -#include -#include -#include -#include -#include -#include -#include "trace.h" -#include "hw.h" -#include "i2c-master.h" - -#define SENSOR_ADDRESS (0x40) - -enum sht21_cmd_e { - SHT21_CMD_TEMP_HOLD = 0xe3, - SHT21_CMD_HUMIDITY_HOLD = 0xe5, - SHT21_CMD_TEMP_NOHOLD = 0xf3, - SHT21_CMD_HUMIDITY_NOHOLD = 0xf5, - SHT21_CMD_WRITE_REG = 0xe6, - SHT21_CMD_READ_REG = 0xe7, - SHT21_CMD_RESET = 0xfe, - /* 0xfa, 0x0f to read serial */ -}; - - -void i2cm_init(void) -{ - rcc_periph_clock_enable(hw_details.periph_rcc); - rcc_periph_reset_pulse(hw_details.periph_rst); - - i2c_set_speed(hw_details.periph, i2c_speed_sm_100k, hw_details.i2c_clock_megahz); - //i2c_set_speed(hw_details.periph, i2c_speed_fm_400k, hw_details.i2c_clock_megahz); - - i2c_peripheral_enable(hw_details.periph); -} - - -static float sht21_convert_temp(uint16_t raw) -{ - //assert((raw & 0x2) == 0x2); - raw &= ~0x3; /* Clear lower status bits */ - float tf = -46.85 + 175.72 * ((float) raw / 65536.0); - return tf; -} - -static float sht21_convert_humi(uint16_t raw) -{ - //assert((raw & 0x2) == 0); - raw &= ~0x3; /* Clear lower status bits */ - float tf = -6 + 125 * ((float) raw / 65536.0); - return tf; -} - -static float sht21_read_temp_hold(uint32_t i2c) -{ - uint8_t data[3]; - 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]); - return sht21_convert_temp(temp); -} - -static float sht21_read_humi_hold(uint32_t i2c) -{ - uint8_t data[3]; - 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]); - return sht21_convert_humi(left); -} - -static void sht21_readid(void) -{ - uint8_t raw = 0; - uint8_t cmd = SHT21_CMD_READ_REG; - printf("RP..."); - i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, &cmd, 1, &raw, 1); - 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); - - printf("raw user reg = %#x\n", raw); - int resolution = ((raw & 0x80) >> 6) | (raw & 1); - printf("temp resolution is in %d bits\n", 14 - resolution); - printf("battery status: %s\n", (raw & (1 << 6) ? "failing" : "good")); - printf("On chip heater: %s\n", (raw & 0x2) ? "on" : "off"); - - uint8_t req1[] = {0xfa, 0x0f}; - uint8_t res[8]; - i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, req1, sizeof(req1), res, 8); - uint8_t req2[] = {0xfc, 0xc9}; - uint8_t res2[8]; - i2c_transfer7(hw_details.periph, SENSOR_ADDRESS, req1, sizeof(req1), res2, 8); - - 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]); -} - -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(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); - -} \ No newline at end of file -- cgit