| 5,6 → 5,17 |
|---|
| |
| static UART1_DATA *uart_data_ptr; |
| |
| /* Note: BRGH values are different from PIC18! |
| * |
| * Baud Rate Calculation (BRGH = 0): |
| * Baud Rate = PerfBusFreq / (16 * (BRG + 1)) |
| * BRG = PerfBusFreq / (16 * Baud Rate) - 1 |
| * |
| * Baud Rate Calculation (BRGH = 1): |
| * Baud Rate = PerfBusFreq / (4 * (BRG + 1)) |
| * BRG = PerfBusFreq / (4 * Baud Rate) - 1 |
| */ |
| |
| void UART1_Init(UART1_DATA *data, void (*rx_callback)(char)) { |
| uart_data_ptr = data; |
| uart_data_ptr->rx_callback = rx_callback; |
| 19,7 → 30,7 |
|---|
| |
| U1MODE = 0x00008000; // UART enabled, BRGH = 0 |
| U1STA = 0x00009400; // TX interrupt on buffer empty, RX interrupt on buffer not empty |
| U1BRG = 19; // Set baud rate to 256000 @ 80MHz |
| U1BRG = 42; // Set baud rate to 115200 @ 80MHz |
| IEC0SET = 0x0C000000; // Enable the RX and Error interrupts |
| |
| INTEnableInterrupts(); |
| 75,7 → 86,7 |
|---|
| } |
| |
| // Process UART1 transmit flag |
| if (IFS0bits.U1TXIF) { |
| if (IFS0bits.U1TXIF && IEC0bits.U1TXIE) { |
| // Disable the transmit interrupt if all data has been sent |
| if (uart_data_ptr->buffer_out_ind == uart_data_ptr->buffer_out_len) { |
| IEC0CLR = 0x10000000; |