| 1,4 → 1,4 |
|---|
| #include "maindefs.h" |
| #include "defines.h" |
| #include "spi.h" |
| |
| static SPI_DATA spi_data; |
| 6,26 → 6,25 |
|---|
| |
| void SPI2_Init(unsigned char speed) { |
| // Set up SPI2 with specified pins |
| RPINR22 = PPS_SPI2_CLK_IN; // SPI2 CLK Input (Pin RB4) |
| PPS_SPI2_CLK_OUT = 11; // SPI2 CLK Output (Pin RB4) |
| #ifndef SPI2_WRITE_ONLY |
| RPINR21 = PPS_SPI2_MISO; // SPI2 Data Input (Pin RB3) |
| #endif |
| PPS_SPI2_MOSI = 10; // SPI2 Data Output (MOSI) (Pin RB2) |
| RPINR22 = PPS_SPI2_CLK_IN; // SPI2 CLK Input |
| PPS_SPI2_CLK_OUT = 11; // SPI2 CLK Output |
| |
| SPI_CLK_TRIS = 0; // SPI2 clock pin (Pin RB4) |
| #ifndef SPI2_WRITE_ONLY |
| SPI_MISO_TRIS = 1; // SPI2 data in pin (Pin RB3)(MISO) |
| RPINR21 = PPS_SPI2_MISO; // SPI2 Data Input |
| SPI_MISO_TRIS = 1; // SPI2 data in pin (MISO) |
| #endif |
| SPI_MOSI_TRIS = 0; // SPI2 data out pin (Pin RB2)(MOSI) |
| |
| SPI_CLK_TRIS = 0; // SPI2 clock pin |
| PPS_SPI2_MOSI = 10; // SPI2 Data Output (MOSI) |
| SPI_MOSI_TRIS = 0; // SPI2 data out pin (MOSI) |
| |
| SPI_SLAVE_SELECT_TRIS = 0; // SPI2 slave select (Pin RB7) |
| SPI_SLAVE_SELECT_TRIS = 0; // SPI2 slave select |
| SPI_SLAVE_SELECT_LAT = 1; // SPI2 SS high (Idle) |
| |
| SPI_RESET_TRIS = 0; // SPI2 reset (Pin RB6) |
| SPI_RESET_TRIS = 0; // SPI2 reset |
| SPI_RESET_LAT = 1; // SPI2 reset active low |
| |
| SPI_DC_SELECT_TRIS = 0; // SPI2 D/C select (Pin RB5) |
| SPI_DC_SELECT_TRIS = 0; // SPI2 D/C select |
| SPI_DC_SELECT_LAT = 0; |
| |
| SSP2STATbits.SMP = 0; // Input is sampled in the middle of data output time |
| 42,43 → 41,15 |
|---|
| PIE3bits.SSP2IE = 0; |
| #endif |
| |
| #ifndef SPI2_WRITE_ONLY |
| spi_data_p->buffer_in_len = 0; |
| spi_data_p->buffer_in_read_ind = 0; |
| spi_data_p->buffer_in_write_ind = 0; |
| #endif |
| spi_data_p->buffer_out_ind = 0; |
| spi_data_p->buffer_out_len = 0; |
| } |
| |
| void SPI2_Recv_Interrupt_Handler() { |
| unsigned char c; |
| |
| if (SSP2STATbits.BF) { // Check if data receive flag is set |
| if (spi_data_p->buffer_in_len == MAXSPIBUF - 1) { |
| DBG_PRINT_SPI("SPI2: (ERROR) buffer overflow\r\n"); |
| c = SSP2BUF; // Read SSP2BUF to clear it |
| } else { |
| // Save received data into buffer |
| spi_data_p->buffer_in[spi_data_p->buffer_in_write_ind] = SSP2BUF; |
| if (spi_data_p->buffer_in_write_ind == MAXSPIBUF - 1) { |
| spi_data_p->buffer_in_write_ind = 0; |
| } else { |
| spi_data_p->buffer_in_write_ind++; |
| } |
| spi_data_p->buffer_in_len++; |
| |
| // Put next byte in SSP2BUF for transmit |
| if (spi_data_p->buffer_out_ind != spi_data_p->buffer_out_len) { |
| SSP2BUF = spi_data_p->buffer_out[spi_data_p->buffer_out_ind]; |
| spi_data_p->buffer_out_ind++; |
| } else { |
| SPI_SLAVE_SELECT_LAT = 1; // Bring SS line high |
| spi_data_p->buffer_out_ind = 0; |
| spi_data_p->buffer_out_len = 0; |
| } |
| } |
| } |
| } |
| |
| void SPI2_Write(unsigned char *msg, unsigned int length) { |
| #ifdef SPI2_USE_INTERRUPT |
| unsigned char i; |
| 117,7 → 88,7 |
|---|
| |
| void SPI2_Write_Repeat(unsigned char c, unsigned int length) { |
| #ifdef SPI2_USE_INTERRUPT |
| // TODO |
| // TODO Implement interrupts for SPI2 |
| #else |
| unsigned int i = 0; |
| unsigned char tmp = 0; |
| 144,6 → 115,37 |
|---|
| #endif |
| } |
| |
| #ifndef SPI2_WRITE_ONLY |
| void SPI2_Recv_Interrupt_Handler() { |
| unsigned char c; |
| |
| if (SSP2STATbits.BF) { // Check if data receive flag is set |
| if (spi_data_p->buffer_in_len == MAXSPIBUF - 1) { |
| DBG_PRINT_SPI("SPI2: (ERROR) buffer overflow\r\n"); |
| c = SSP2BUF; // Read SSP2BUF to clear it |
| } else { |
| // Save received data into buffer |
| spi_data_p->buffer_in[spi_data_p->buffer_in_write_ind] = SSP2BUF; |
| if (spi_data_p->buffer_in_write_ind == MAXSPIBUF - 1) { |
| spi_data_p->buffer_in_write_ind = 0; |
| } else { |
| spi_data_p->buffer_in_write_ind++; |
| } |
| spi_data_p->buffer_in_len++; |
| |
| // Put next byte in SSP2BUF for transmit |
| if (spi_data_p->buffer_out_ind != spi_data_p->buffer_out_len) { |
| SSP2BUF = spi_data_p->buffer_out[spi_data_p->buffer_out_ind]; |
| spi_data_p->buffer_out_ind++; |
| } else { |
| SPI_SLAVE_SELECT_LAT = 1; // Bring SS line high |
| spi_data_p->buffer_out_ind = 0; |
| spi_data_p->buffer_out_len = 0; |
| } |
| } |
| } |
| } |
| |
| void SPI2_Read(unsigned char length) { |
| #ifdef SPI2_USE_INTERRUPT |
| unsigned char i; |
| 191,4 → 193,5 |
|---|
| spi_data_p->buffer_in_len--; |
| } |
| return i; |
| } |
| } |
| #endif |