struct Max31855Data readMax31855Data()
{
union {
uint32_t dword;
struct Max31855Data data;
} u;
GPIO_PinClear(p_cs);
for (int i = 0; i < 32; i++)
{
u.dword <<= 1;
GPIO_PinSet(p_clk); /* Set CLK to sample value */
WAIT_Waitus(1);
if ( GPIO_Read(GPIOB) & (1l << (p_miso - 32)) )
u.dword |= 1; /* Read value from MISO */
GPIO_PinClear(p_clk); /* Set CLK to shift value */
}
GPIO_PinSet(p_cs);
return u.data;
}
void SetLine(uint8_t line)
{
GPIO_PinSet(KEYBED_LINE_EN_DIS); /* turn decoder off (inverted logic) */
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
#ifdef BOARD_EMPHASE_V01_REV_A
FIO1CLR2 = 0b11110000; /* reset all 4 pins */
FIO1SET2 = line << 4; /* set the encoded line */
#elif BOARD_PROTOTYPE
FIO0CLR0 = 0b11110000; /* reset all 4 pins */
FIO0SET0 = line << 4; /* set the encoded line */
#endif
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
_delay_clk;
GPIO_PinClr(KEYBED_LINE_EN_DIS); /* enable decoder ic */
}
void initMAX31855()
{
GPIO_PinInit(p_clk, GPIO_PinOutput);
GPIO_PinInit(p_cs, GPIO_PinOutput);
GPIO_PinInit(p_miso, GPIO_PinInput);
GPIO_PinClear(p_clk);
GPIO_PinSet(p_cs);
}
/** @brief General initialization of the input and output pins. (public)
@todo KEYBED_Init(): Pin-Names should be defined in nl_board.h
*******************************************************************************/
void KEYBED_Init(void)
{
/* output pins for the line decoder */
GPIO_PinOpt(KEYBED_LINE_A);
GPIO_PinOpt(KEYBED_LINE_B);
GPIO_PinOpt(KEYBED_LINE_C);
GPIO_PinOpt(KEYBED_LINE_D);
GPIO_PinOpt(KEYBED_LINE_EN_DIS); // Enable Pin of the Line Decoder
/* explicite states */
GPIO_PinClr(KEYBED_LINE_A);
GPIO_PinClr(KEYBED_LINE_B);
GPIO_PinClr(KEYBED_LINE_C);
GPIO_PinClr(KEYBED_LINE_D);
GPIO_PinSet(KEYBED_LINE_EN_DIS); // turn decoder off (inverted logic)
/* input pins for the keys*/
GPIO_PinIpt(KEYBED_KEY_0);
GPIO_PinIpt(KEYBED_KEY_1);
GPIO_PinIpt(KEYBED_KEY_2);
GPIO_PinIpt(KEYBED_KEY_3);
GPIO_PinIpt(KEYBED_KEY_4);
GPIO_PinIpt(KEYBED_KEY_5);
GPIO_PinIpt(KEYBED_KEY_6);
GPIO_PinIpt(KEYBED_KEY_7);
/* no pull ups for the inputs */
GPIO_PinMod(KEYBED_KEY_0, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_1, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_2, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_3, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_4, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_5, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_6, GPIO_FLOATING);
GPIO_PinMod(KEYBED_KEY_7, GPIO_FLOATING);
SetLine(1);
}
/** @brief With this function the Error Led on the emphase mainboard can be
turned on. The programm will stay until the Task_Error_Reset button
is pressed.
*******************************************************************************/
void DEBUG_ErrorLed(void)
{
GPIO_PinSet(DEBUG_LED_ERROR);
while (GPIO_PinGet(DEBUG_BUTTON_TASK_ERROR_RESET) == 1);
GPIO_PinClr(DEBUG_LED_ERROR);
}
