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Make the two keyboard halves communicate with each other via I2C.

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This commit is contained in:
László Monda
2016-03-11 15:39:08 +01:00
parent 7b30750ef5
commit 51de538b4a
16 changed files with 180 additions and 24 deletions
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70
left/main.c
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@@ -1,8 +1,52 @@
#include "board.h"
#include "fsl_clock_manager.h"
#include "fsl_i2c_slave_driver.h"
#include "fsl_i2c_shared_function.h"
#include "i2c.h"
#include "main.h"
uint8_t isSw2Pressed;
uint8_t isSw3Pressed;
uint8_t buffer[I2C_DATA_LENGTH];
void I2C0_IRQHandler(void)
{
I2C_DRV_IRQHandler(I2C0_IDX);
}
static void i2c_slave_callback(uint8_t instance, i2c_slave_event_t i2cEvent, void *param)
{
i2c_slave_state_t *slaveState = I2C_DRV_SlaveGetHandler(instance);
switch (i2cEvent) {
case kI2CSlaveTxReq:
slaveState->txSize = I2C_DATA_LENGTH;
slaveState ->txBuff = buffer;
slaveState ->isTxBusy = true;
buffer[0] = isSw2Pressed;
buffer[1] = isSw3Pressed;
break;
case kI2CSlaveTxEmpty:
slaveState->isTxBusy = false;
break;
default:
break;
}
}
int main(void)
{
// Initialize clock.
CLOCK_SYS_EnablePortClock(PORTA_IDX);
CLOCK_SYS_EnablePortClock(PORTB_IDX);
BOARD_ClockInit();
// Initialize GPIO.
gpio_input_pin_user_config_t inputPin[] =
{
{
@@ -43,16 +87,28 @@ int main(void)
}
};
CLOCK_SYS_EnablePortClock(PORTA_IDX);
CLOCK_SYS_EnablePortClock(PORTB_IDX);
BOARD_ClockInit();
GPIO_DRV_Init(inputPin, outputPin);
// Initialize I2C.
i2c_slave_state_t slave;
i2c_slave_user_config_t userConfig = {
.address = LEFT_KEYBOARD_HALF_I2C_ADDRESS_7BIT,
.slaveCallback = i2c_slave_callback,
.callbackParam = NULL,
.slaveListening = true,
.startStopDetect = true,
};
configure_i2c_pins(0);
I2C_DRV_SlaveInit(BOARD_I2C_INSTANCE, &userConfig, &slave);
// Update switch states and toggle LEDs accordingly.
while (1) {
uint8_t isSw2Pressed = GPIO_DRV_ReadPinInput(kGpioSW2);
uint8_t isSw3Pressed = GPIO_DRV_ReadPinInput(kGpioSW3);
isSw2Pressed = GPIO_DRV_ReadPinInput(kGpioSW2);
isSw3Pressed = GPIO_DRV_ReadPinInput(kGpioSW3);
GPIO_DRV_WritePinOutput(kGpioLED1, isSw2Pressed);
GPIO_DRV_WritePinOutput(kGpioLED3, isSw3Pressed);
}