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driver/fw: current sensor works

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This commit is contained in:
jaseg 2019-04-15 12:28:22 +09:00
parent a860bd27a0
commit a8448facca
5 changed files with 135 additions and 3 deletions
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2
driver/driver.sch
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@ -2745,6 +2745,6 @@ F 3 "~" H 17400 2950 50 0001 C CNN
1 0 0 -1
$EndComp
Text Notes 7600 10050 0 50 ~ 0
TODO:\n* RS485 drv fp is wide, should be narrow SOIC-8\n* Heatsink holes are plated-through, shouln't be\n* Add thermal reliefs in upper logic ground plane\n* GND/VCC input labels are swapped\n* White label field for MAC\n* Remove optoisolators\n* Add series resistor to RS485 GND\n* Add decoupling cap next to mosfet temp sensor
TODO:\n* RS485 drv fp is wide, should be narrow SOIC-8\n* Heatsink holes are plated-through, shouln't be\n* Add thermal reliefs in upper logic ground plane\n* GND/VCC input labels are swapped\n* White label field for MAC\n* Remove optoisolators\n* Add series resistor to RS485 GND\n* Add decoupling cap next to mosfet temp sensor\n* Add INA226 filter network (see datasheet p.14)
NoConn ~ 14600 2800
$EndSCHEMATC

5
driver_fw/Makefile
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@ -30,6 +30,9 @@ LDFLAGS += -Tstm32_flash.ld
CFLAGS += -I$(CMSIS_DEV_PATH)/Include -I$(CMSIS_PATH)/Include -I$(HAL_PATH)/Inc -Iconfig -I../common
#LDFLAGS += -L$(CMSIS_PATH)/Lib/GCC -larm_cortexM0l_math
SOURCES = main.c startup_stm32f030x6.s system_stm32f0xx.c base.c $(HAL_PATH)/Src/stm32f0xx_ll_utils.c cmsis_exports.c \
../common/8b10b.c serial.c mac.c i2c.c lcd1602.c mcp9801.c ina226.c
###################################################
.PHONY: program clean
@ -50,7 +53,7 @@ cmsis_exports.c: $(CMSIS_DEV_PATH)/Include/stm32f030x6.h $(CMSIS_PATH)/Include/c
%.dot: %.elf
r2 -a arm -qc 'aa;agC' $< 2>/dev/null >$@
main.elf: main.o startup_stm32f030x6.o system_stm32f0xx.o $(HAL_PATH)/Src/stm32f0xx_ll_utils.o cmsis_exports.o ../common/8b10b.o serial.o mac.o i2c.o lcd1602.o mcp9801.o base.o
main.elf: $(SOURCES)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
$(OBJCOPY) -O ihex $@ $(@:.elf=.hex)
$(OBJCOPY) -O binary $@ $(@:.elf=.bin)

27
driver_fw/ina226.c Normal file
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@ -0,0 +1,27 @@
#include "global.h"
#include "i2c.h"
#include "ina226.h"
void ina226_init() {
/* FIXME plug in final values for I meas backchannel */
uint16_t config = INA226_CONFIG_AVG_128 | INA226_CONFIG_VBUSCT_204u | INA226_CONFIG_VSHCT_1m1 |
INA226_CONFIG_MODE_SHUNT | INA226_CONFIG_MODE_BUS | INA226_CONFIG_MODE_CONT;
ina226_write_reg(INA226_REG_CONFIG, config);
ina226_write_reg(INA226_REG_CAL, INA226_CAL);
}
void ina226_write_reg(uint8_t reg, uint16_t val) {
uint8_t buf[3] = { reg, val>>8, val&0xff };
i2c_transmit(INA226_I2C_PERIPH, buf, sizeof(buf), INA226_I2C_ADDR, I2C_GENSTOP_YES);
}
uint16_t ina226_read_reg(uint8_t reg) {
uint8_t buf2[1] = { reg };
i2c_transmit(INA226_I2C_PERIPH, buf2, sizeof(buf2), INA226_I2C_ADDR, I2C_GENSTOP_NO);
uint8_t rx[2];
i2c_receive(INA226_I2C_PERIPH, rx, sizeof(rx), INA226_I2C_ADDR);
return (rx[0]<<8) | rx[1];
}

84
driver_fw/ina226.h Normal file
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@ -0,0 +1,84 @@
#ifndef __INA226_H__
#define __INA226_H__
#include <stdint.h>
#define INA226_I2C_PERIPH I2C1
#define INA226_I2C_ADDR 0x80
#define INA226_I_LSB_uA 2000
#define INA226_RSHUNT_uOhm 2000
/* FIXME validate this */
#define INA226_CAL (5120000 / INA226_I_LSB_uA * 1000 / INA226_RSHUNT_uOhm)
enum ina226_reg {
INA226_REG_CONFIG = 0x00,
INA226_REG_VS = 0x01,
INA226_REG_VB = 0x02,
INA226_REG_P = 0x03,
INA226_REG_I = 0x04,
INA226_REG_CAL = 0x05,
INA226_REG_MASK_EN = 0x06,
INA226_REG_ALERT = 0x07,
INA226_REG_MFGID = 0xfe,
INA226_REG_DIEID = 0xff
};
enum ina226_config {
INA226_CONFIG_RST = 1<<15,
INA226_CONFIG_AVG_Pos = 9,
INA226_CONFIG_AVG_Msk = 3<<9,
INA226_CONFIG_AVG_1 = 0<<9,
INA226_CONFIG_AVG_4 = 1<<9,
INA226_CONFIG_AVG_16 = 2<<9,
INA226_CONFIG_AVG_64 = 3<<9,
INA226_CONFIG_AVG_128 = 4<<9,
INA226_CONFIG_AVG_256 = 5<<9,
INA226_CONFIG_AVG_512 = 6<<9,
INA226_CONFIG_AVG_1024 = 7<<9,
INA226_CONFIG_VBUSCT_Pos = 6,
INA226_CONFIG_VBUSCT_Msk = 7<<6,
INA226_CONFIG_VBUSCT_140u = 0<<6,
INA226_CONFIG_VBUSCT_204u = 1<<6,
INA226_CONFIG_VBUSCT_332u = 2<<6,
INA226_CONFIG_VBUSCT_588u = 3<<6,
INA226_CONFIG_VBUSCT_1m1 = 4<<6,
INA226_CONFIG_VBUSCT_2m116 = 5<<6,
INA226_CONFIG_VBUSCT_4m156 = 6<<6,
INA226_CONFIG_VBUSCT_8m244 = 7<<6,
INA226_CONFIG_VSHCT_Pos = 3,
INA226_CONFIG_VSHCT_Msk = 7<<3,
INA226_CONFIG_VSHCT_140u = 0<<3,
INA226_CONFIG_VSHCT_204u = 1<<3,
INA226_CONFIG_VSHCT_332u = 2<<3,
INA226_CONFIG_VSHCT_588u = 3<<3,
INA226_CONFIG_VSHCT_1m1 = 4<<3,
INA226_CONFIG_VSHCT_2m116 = 5<<3,
INA226_CONFIG_VSHCT_4m156 = 6<<3,
INA226_CONFIG_VSHCT_8m244 = 7<<3,
INA226_CONFIG_MODE_Pos = 0,
INA226_CONFIG_MODE_Msk = 7,
INA226_CONFIG_MODE_POWERDOWN = 0,
INA226_CONFIG_MODE_SHUNT = 1,
INA226_CONFIG_MODE_BUS = 2,
INA226_CONFIG_MODE_TRIG = 0,
INA226_CONFIG_MODE_CONT = 4
};
void ina226_init(void);
void ina226_write_reg(uint8_t reg, uint16_t val);
uint16_t ina226_read_reg(uint8_t reg);
static inline int16_t ina226_read_i(void) { return (int16_t)ina226_read_reg(INA226_REG_I); }
static inline int16_t ina226_read_v(void) { return (int16_t)ina226_read_reg(INA226_REG_VB); }
static inline uint16_t ina226_read_p(void) { return ina226_read_reg(INA226_REG_P); }
static inline int16_t ina226_read_vs(void) { return (int16_t)ina226_read_reg(INA226_REG_VS); }
#endif /* __INA226_H__ */

20
driver_fw/main.c
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@ -21,6 +21,7 @@
#include "i2c.h"
#include "lcd1602.h"
#include "mcp9801.h"
#include "ina226.h"
#include <8b10b.h>
@ -161,6 +162,7 @@ int main(void) {
using a Java(TM) GUI. */
i2c_enable(I2C1);
lcd1602_init();
ina226_init();
/* The MCP9801 temperature sensor is initialized below in the SysTick ISR since it needs a few milliseconds to
* powerup. */
@ -254,6 +256,11 @@ void SVC_Handler(void) {
void PendSV_Handler(void) {
}
char hexdigit(uint8_t nibble) {
nibble &= 0xf;
return (nibble < 10) ? ('0' + nibble) : ('A' + nibble - 10);
}
void SysTick_Handler(void) {
sys_time_tick++;
sys_time_ms += TICK_MS;
@ -271,7 +278,18 @@ void SysTick_Handler(void) {
buf[9] = (temp%100)/10 + '0';
buf[11] = temp%10 + '0';
lcd_write_str(0, 0, buf);
lcd_write_str(0, 1, " "" "" "" ");
strcpy(buf, "INA:XXXX""/XXX""X ");
uint16_t rx = ina226_read_i();
buf[4] = hexdigit(rx>>12);
buf[5] = hexdigit(rx>>8);
buf[6] = hexdigit(rx>>4);
buf[7] = hexdigit(rx>>0);
rx = ina226_read_v();
buf[9] = hexdigit(rx>>12);
buf[10] = hexdigit(rx>>8);
buf[11] = hexdigit(rx>>4);
buf[12] = hexdigit(rx>>0);
lcd_write_str(0, 1, buf);
mcp9801_init();
}