/*---------------------------------------------------------------------------------------------------------*/
int32_t main(void)
{
/* Unlock protected registers */
SYS->REGWRPROT = 0x59;
SYS->REGWRPROT = 0x16;
SYS->REGWRPROT = 0x88;
/* Init System, IP clock and multi-function I/O */
SYS_Init();
/* Lock protected registers */
SYS->REGWRPROT = 0x0;
/* Init UART0 for printf */
UART0_Init();
/* Init UART1 for testing */
UART1_Init();
/*---------------------------------------------------------------------------------------------------------*/
/* SAMPLE CODE */
/*---------------------------------------------------------------------------------------------------------*/
printf("\n\nCPU @ %dHz\n", SystemCoreClock);
printf("\n\nUART Sample Program\n");
/* UART RS485 sample slave function */
RS485_9bitModeSlave();
}
/*---------------------------------------------------------------------------------------------------------*/
void RS485_FunctionTest()
{
uint32_t u32Item;
printf("\n\n");
printf("+-----------------------------------------------------------+\n");
printf("| IO Setting |\n");
printf("+-----------------------------------------------------------+\n");
printf("| ______ _______ |\n");
printf("| | | | | |\n");
printf("| |Master|---TXD1(pin46) <====> RXD1(pin45)---|Slave | |\n");
printf("| | |---RTS1(pin39) <====> RTS1(pin39)---| | |\n");
printf("| |______| |_______| |\n");
printf("| |\n");
printf("+-----------------------------------------------------------+\n\n");
printf("+-----------------------------------------------------------+\n");
printf("| RS485 Function Test |\n");
printf("+-----------------------------------------------------------+\n");
printf("| Please select Master or Slave test |\n");
printf("| [0] Master [1] Slave |\n");
printf("+-----------------------------------------------------------+\n\n");
u32Item = GetChar();
/*
The sample code is used to test RS485 9-bit mode and needs
two Module test board to complete the test.
Master:
1.Set AUD mode and HW will control RTS pin. LEV_RTS is set to '0'.
2.Master will send four different address with 10 bytes data to test Slave.
3.Address bytes : the parity bit should be '1'. (Set UA_LCR = 0x2B)
4.Data bytes : the parity bit should be '0'. (Set UA_LCR = 0x3B)
5.RTS pin is low in idle state. When master is sending,
RTS pin will be pull high.
Slave:
1.Set AAD and AUD mode firstly. LEV_RTS is set to '0'.
2.The received byte, parity bit is '1' , is considered "ADDRESS".
3.The received byte, parity bit is '0' , is considered "DATA". (Default)
4.AAD: The slave will ignore any data until ADDRESS match ADDR_MATCH value.
When RLS and RDA interrupt is happend,it means the ADDRESS is received.
Check if RS485_ADD_DETF is set and read UA_RBR to clear ADDRESS stored in rx_fifo.
NMM: The slave will ignore data byte until disable RX_DIS.
When RLS and RDA interrupt is happend,it means the ADDRESS is received.
Check the ADDRESS is match or not by user in UART_IRQHandler.
If the ADDRESS is match,clear RX_DIS bit to receive data byte.
If the ADDRESS is not match,set RX_DIS bit to avoid data byte stored in FIFO.
*/
if(u32Item =='0')
RS485_9bitModeMaster();
else
RS485_9bitModeSlave();
}
