66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
#include "ch32fun.h"
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#include "i2c_driver.h"
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#include "fan_driver.h"
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#include "i2c.h"
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volatile uint8_t i2c_registers[16] = {0x00};
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void update_fan_from_regs(volatile uint8_t *reg) {
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fan_driver_target_rpm = i2c_get_register_word(reg, I2C_REG_TARGET_RPM);
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fan_driver_pwm_set_duty(i2c_get_register_word(reg, I2C_REG_CURRENT_DUTY));
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fan_driver_constant_duty = !(reg[I2C_REG_MODE] & 0x01);
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fan_driver_powered_down = (reg[I2C_REG_MODE] & 0x02) >> 1;
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}
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void onWrite(const uint8_t reg, const uint8_t length) {
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if (length == 0) return;
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switch (reg) {
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case I2C_REG_TARGET_RPM:
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update_fan_from_regs(i2c_registers);
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printf("set tgt fan speed to %d\n", fan_driver_target_rpm);
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break;
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case I2C_REG_CURRENT_DUTY:
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update_fan_from_regs(i2c_registers);
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printf("set duty cycle to %d\n", fan_driver_pwm_get_duty());
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break;
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case I2C_REG_MODE:
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update_fan_from_regs(i2c_registers);
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printf("set mode register to %x. constant duty mode is %d, powered down is %d\n",
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i2c_registers[I2C_REG_MODE], fan_driver_constant_duty, fan_driver_powered_down);
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break;
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default:
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i2c_registers_reinit(i2c_registers);
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break;
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}
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}
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int main() {
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SystemInit();
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printf("System bootup\n");
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// Initialize I2C slave
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funGpioInitC();
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funPinMode(PC1, GPIO_CFGLR_OUT_10Mhz_AF_OD); // SDA
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funPinMode(PC2, GPIO_CFGLR_OUT_10Mhz_AF_OD); // SCL
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i2c_registers_reinit(i2c_registers);
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i2c_registers_set_defaults(i2c_registers);
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update_fan_from_regs(i2c_registers);
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fan_driver_init();
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SetupI2CSlave(I2C_DEVICE_ADDR, i2c_registers, sizeof(i2c_registers), onWrite, NULL, false);
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while (1) {
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fan_driver_control_loop();
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i2c_set_register_word(i2c_registers, I2C_REG_CURRENT_RPM, fan_driver_current_rpm);
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i2c_set_register_word(i2c_registers, I2C_REG_CURRENT_DUTY, fan_driver_pwm_get_duty());
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i2c_registers[I2C_REG_STATE] = (!fan_driver_is_steady) | (fan_driver_is_stalled << 1);
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Delay_Ms(250);
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}
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}
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