SPRUIU1D July 2020 – December 2024 DRA821U , DRA821U-Q1
The following programming model explains how to program the module to receive the IrDA frame with no parity, baud rate = 4 Mbps, FIFOs enabled, 8-bit word length.
| Step | Register/Bit Field/Programming Model | Value |
|---|---|---|
| Disable UART mode | UART_MDR1[2-0] MODE_SELECT | 0x7 |
| Grant access to the UART_DLL and UART_DLH registers | UART_LCR[7-0] | 0x80 |
| Enable access to change UART_FCR[0] | UART_DLL[7-0] CLOCK_LSB | 0x0 |
| UART_DLH[7-0] CLOCK_MSB | ||
| FIFO clear and enable | UART_FCR[2-0] | 0x7 |
| Set the FIFO trigger level | see Section 12.1.6.5.4, Load FIFO trigger and DMA mode settings | |
| Set FIR mode | UART_MDR1[2-0] MODE_SELECT | 0x5 |
| Set frame length | UART_RXFLL[7-0] RXFLL | 0xA |
| Disable access to the UART_DLL and UART_DLH registers | UART_LCR[7-0] | 0x00 |
| Enable the UART_RHR interrupt | UART_IER_IRDA[0] RHR_IT | 1 |