Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
UART/RS485_Master/rs485_master.c@0:bf7b9fba3924, 2011-03-20 (annotated)
- Committer:
- frank26080115
- Date:
- Sun Mar 20 05:38:56 2011 +0000
- Revision:
- 0:bf7b9fba3924
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| frank26080115 | 0:bf7b9fba3924 | 1 | /***********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 2 | * @file rs485_master.c |
| frank26080115 | 0:bf7b9fba3924 | 3 | * @purpose This example used to test RS485 functionality on UART1 of |
| frank26080115 | 0:bf7b9fba3924 | 4 | * LPC1768.In this case, RS485 function on UART1 acts as Master |
| frank26080115 | 0:bf7b9fba3924 | 5 | * on RS485 bus. |
| frank26080115 | 0:bf7b9fba3924 | 6 | * @version 2.0 |
| frank26080115 | 0:bf7b9fba3924 | 7 | * @date 21. May. 2010 |
| frank26080115 | 0:bf7b9fba3924 | 8 | * @author NXP MCU SW Application Team |
| frank26080115 | 0:bf7b9fba3924 | 9 | *--------------------------------------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 10 | * Software that is described herein is for illustrative purposes only |
| frank26080115 | 0:bf7b9fba3924 | 11 | * which provides customers with programming information regarding the |
| frank26080115 | 0:bf7b9fba3924 | 12 | * products. This software is supplied "AS IS" without any warranties. |
| frank26080115 | 0:bf7b9fba3924 | 13 | * NXP Semiconductors assumes no responsibility or liability for the |
| frank26080115 | 0:bf7b9fba3924 | 14 | * use of the software, conveys no license or title under any patent, |
| frank26080115 | 0:bf7b9fba3924 | 15 | * copyright, or mask work right to the product. NXP Semiconductors |
| frank26080115 | 0:bf7b9fba3924 | 16 | * reserves the right to make changes in the software without |
| frank26080115 | 0:bf7b9fba3924 | 17 | * notification. NXP Semiconductors also make no representation or |
| frank26080115 | 0:bf7b9fba3924 | 18 | * warranty that such application will be suitable for the specified |
| frank26080115 | 0:bf7b9fba3924 | 19 | * use without further testing or modification. |
| frank26080115 | 0:bf7b9fba3924 | 20 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 21 | #include "lpc17xx_uart.h" |
| frank26080115 | 0:bf7b9fba3924 | 22 | #include "lpc17xx_libcfg.h" |
| frank26080115 | 0:bf7b9fba3924 | 23 | #include "lpc17xx_pinsel.h" |
| frank26080115 | 0:bf7b9fba3924 | 24 | |
| frank26080115 | 0:bf7b9fba3924 | 25 | /* Example group ----------------------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 26 | /** @defgroup UART_RS485_Master RS485_Master |
| frank26080115 | 0:bf7b9fba3924 | 27 | * @ingroup UART_Examples |
| frank26080115 | 0:bf7b9fba3924 | 28 | * @{ |
| frank26080115 | 0:bf7b9fba3924 | 29 | */ |
| frank26080115 | 0:bf7b9fba3924 | 30 | |
| frank26080115 | 0:bf7b9fba3924 | 31 | /************************** PRIVATE DEFINITIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 32 | // Slave Address |
| frank26080115 | 0:bf7b9fba3924 | 33 | #define SLAVE_ADDR_A 'A' |
| frank26080115 | 0:bf7b9fba3924 | 34 | #define SLAVE_ADDR_B 'B' |
| frank26080115 | 0:bf7b9fba3924 | 35 | |
| frank26080115 | 0:bf7b9fba3924 | 36 | /* buffer size definition */ |
| frank26080115 | 0:bf7b9fba3924 | 37 | #define UART_RING_BUFSIZE 256 |
| frank26080115 | 0:bf7b9fba3924 | 38 | |
| frank26080115 | 0:bf7b9fba3924 | 39 | /* Buf mask */ |
| frank26080115 | 0:bf7b9fba3924 | 40 | #define __BUF_MASK (UART_RING_BUFSIZE-1) |
| frank26080115 | 0:bf7b9fba3924 | 41 | /* Check buf is full or not */ |
| frank26080115 | 0:bf7b9fba3924 | 42 | #define __BUF_IS_FULL(head, tail) ((tail&__BUF_MASK)==((head+1)&__BUF_MASK)) |
| frank26080115 | 0:bf7b9fba3924 | 43 | /* Check buf will be full in next receiving or not */ |
| frank26080115 | 0:bf7b9fba3924 | 44 | #define __BUF_WILL_FULL(head, tail) ((tail&__BUF_MASK)==((head+2)&__BUF_MASK)) |
| frank26080115 | 0:bf7b9fba3924 | 45 | /* Check buf is empty */ |
| frank26080115 | 0:bf7b9fba3924 | 46 | #define __BUF_IS_EMPTY(head, tail) ((head&__BUF_MASK)==(tail&__BUF_MASK)) |
| frank26080115 | 0:bf7b9fba3924 | 47 | /* Reset buf */ |
| frank26080115 | 0:bf7b9fba3924 | 48 | #define __BUF_RESET(bufidx) (bufidx=0) |
| frank26080115 | 0:bf7b9fba3924 | 49 | #define __BUF_INCR(bufidx) (bufidx=(bufidx+1)&__BUF_MASK) |
| frank26080115 | 0:bf7b9fba3924 | 50 | |
| frank26080115 | 0:bf7b9fba3924 | 51 | /************************** PRIVATE VARIABLES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 52 | uint8_t menu1[] = "Hello NXP Semiconductors \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 53 | uint8_t menu2[] = "RS485 demo in Master mode \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 54 | uint8_t send_menu[] = "Sending... \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 55 | uint8_t recv_menu[] = "Receive: "; |
| frank26080115 | 0:bf7b9fba3924 | 56 | uint8_t p_err_menu[] = "Parity error \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 57 | uint8_t f_err_menu[] = "Frame error \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 58 | uint8_t nextline[] = "\n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 59 | |
| frank26080115 | 0:bf7b9fba3924 | 60 | uint8_t slaveA_msg[] = "Msg A: Hello NXP"; |
| frank26080115 | 0:bf7b9fba3924 | 61 | uint8_t slaveB_msg[] = "Msg B: Hello NXP"; |
| frank26080115 | 0:bf7b9fba3924 | 62 | uint8_t terminator = 13; |
| frank26080115 | 0:bf7b9fba3924 | 63 | |
| frank26080115 | 0:bf7b9fba3924 | 64 | /************************** PRIVATE TYPES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 65 | /** @brief UART Ring buffer structure */ |
| frank26080115 | 0:bf7b9fba3924 | 66 | typedef struct |
| frank26080115 | 0:bf7b9fba3924 | 67 | { |
| frank26080115 | 0:bf7b9fba3924 | 68 | __IO uint32_t tx_head; /*!< UART Tx ring buffer head index */ |
| frank26080115 | 0:bf7b9fba3924 | 69 | __IO uint32_t tx_tail; /*!< UART Tx ring buffer tail index */ |
| frank26080115 | 0:bf7b9fba3924 | 70 | __IO uint32_t rx_head; /*!< UART Rx ring buffer head index */ |
| frank26080115 | 0:bf7b9fba3924 | 71 | __IO uint32_t rx_tail; /*!< UART Rx ring buffer tail index */ |
| frank26080115 | 0:bf7b9fba3924 | 72 | __IO uint8_t tx[UART_RING_BUFSIZE]; /*!< UART Tx data ring buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 73 | __IO uint8_t rx[UART_RING_BUFSIZE]; /*!< UART Rx data ring buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 74 | } UART_RING_BUFFER_T; |
| frank26080115 | 0:bf7b9fba3924 | 75 | |
| frank26080115 | 0:bf7b9fba3924 | 76 | /************************** PRIVATE VARIABLES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 77 | // UART Ring buffer |
| frank26080115 | 0:bf7b9fba3924 | 78 | UART_RING_BUFFER_T rb; |
| frank26080115 | 0:bf7b9fba3924 | 79 | |
| frank26080115 | 0:bf7b9fba3924 | 80 | /************************** PRIVATE FUNCTIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 81 | void UART1_IRQHandler(void); |
| frank26080115 | 0:bf7b9fba3924 | 82 | void UART_IntReceive(void); |
| frank26080115 | 0:bf7b9fba3924 | 83 | void UART_IntErr(uint8_t bLSErrType); |
| frank26080115 | 0:bf7b9fba3924 | 84 | |
| frank26080115 | 0:bf7b9fba3924 | 85 | uint32_t UARTReceive(LPC_UART_TypeDef *UARTPort, uint8_t *rxbuf, uint8_t buflen); |
| frank26080115 | 0:bf7b9fba3924 | 86 | void print_menu(void); |
| frank26080115 | 0:bf7b9fba3924 | 87 | |
| frank26080115 | 0:bf7b9fba3924 | 88 | |
| frank26080115 | 0:bf7b9fba3924 | 89 | |
| frank26080115 | 0:bf7b9fba3924 | 90 | /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 91 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 92 | * @brief UART1 interrupt handler sub-routine |
| frank26080115 | 0:bf7b9fba3924 | 93 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 94 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 95 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 96 | void UART1_IRQHandler(void) |
| frank26080115 | 0:bf7b9fba3924 | 97 | { |
| frank26080115 | 0:bf7b9fba3924 | 98 | uint32_t intsrc, tmp, tmp1; |
| frank26080115 | 0:bf7b9fba3924 | 99 | |
| frank26080115 | 0:bf7b9fba3924 | 100 | /* Determine the interrupt source */ |
| frank26080115 | 0:bf7b9fba3924 | 101 | intsrc = UART_GetIntId(LPC_UART0); |
| frank26080115 | 0:bf7b9fba3924 | 102 | tmp = intsrc & UART_IIR_INTID_MASK; |
| frank26080115 | 0:bf7b9fba3924 | 103 | |
| frank26080115 | 0:bf7b9fba3924 | 104 | // Receive Line Status |
| frank26080115 | 0:bf7b9fba3924 | 105 | if (tmp == UART_IIR_INTID_RLS){ |
| frank26080115 | 0:bf7b9fba3924 | 106 | // Check line status |
| frank26080115 | 0:bf7b9fba3924 | 107 | tmp1 = UART_GetLineStatus(LPC_UART0); |
| frank26080115 | 0:bf7b9fba3924 | 108 | // Mask out the Receive Ready and Transmit Holding empty status |
| frank26080115 | 0:bf7b9fba3924 | 109 | tmp1 &= (UART_LSR_OE | UART_LSR_PE | UART_LSR_FE \ |
| frank26080115 | 0:bf7b9fba3924 | 110 | | UART_LSR_BI | UART_LSR_RXFE); |
| frank26080115 | 0:bf7b9fba3924 | 111 | // If any error exist |
| frank26080115 | 0:bf7b9fba3924 | 112 | if (tmp1) { |
| frank26080115 | 0:bf7b9fba3924 | 113 | UART_IntErr(tmp1); |
| frank26080115 | 0:bf7b9fba3924 | 114 | } |
| frank26080115 | 0:bf7b9fba3924 | 115 | } |
| frank26080115 | 0:bf7b9fba3924 | 116 | |
| frank26080115 | 0:bf7b9fba3924 | 117 | // Receive Data Available or Character time-out |
| frank26080115 | 0:bf7b9fba3924 | 118 | if ((tmp == UART_IIR_INTID_RDA) || (tmp == UART_IIR_INTID_CTI)){ |
| frank26080115 | 0:bf7b9fba3924 | 119 | UART_IntReceive(); |
| frank26080115 | 0:bf7b9fba3924 | 120 | } |
| frank26080115 | 0:bf7b9fba3924 | 121 | |
| frank26080115 | 0:bf7b9fba3924 | 122 | } |
| frank26080115 | 0:bf7b9fba3924 | 123 | |
| frank26080115 | 0:bf7b9fba3924 | 124 | /********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 125 | * @brief UART receive function (ring buffer used) |
| frank26080115 | 0:bf7b9fba3924 | 126 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 127 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 128 | *********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 129 | void UART_IntReceive(void) |
| frank26080115 | 0:bf7b9fba3924 | 130 | { |
| frank26080115 | 0:bf7b9fba3924 | 131 | uint8_t tmpc; |
| frank26080115 | 0:bf7b9fba3924 | 132 | uint32_t rLen; |
| frank26080115 | 0:bf7b9fba3924 | 133 | |
| frank26080115 | 0:bf7b9fba3924 | 134 | while(1){ |
| frank26080115 | 0:bf7b9fba3924 | 135 | // Call UART read function in UART driver |
| frank26080115 | 0:bf7b9fba3924 | 136 | rLen = UART_Receive((LPC_UART_TypeDef *)LPC_UART1, &tmpc, 1, NONE_BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 137 | // If data received |
| frank26080115 | 0:bf7b9fba3924 | 138 | if (rLen){ |
| frank26080115 | 0:bf7b9fba3924 | 139 | /* Check if buffer is more space |
| frank26080115 | 0:bf7b9fba3924 | 140 | * If no more space, remaining character will be trimmed out |
| frank26080115 | 0:bf7b9fba3924 | 141 | */ |
| frank26080115 | 0:bf7b9fba3924 | 142 | if (!__BUF_IS_FULL(rb.rx_head,rb.rx_tail)){ |
| frank26080115 | 0:bf7b9fba3924 | 143 | rb.rx[rb.rx_head] = tmpc; |
| frank26080115 | 0:bf7b9fba3924 | 144 | __BUF_INCR(rb.rx_head); |
| frank26080115 | 0:bf7b9fba3924 | 145 | } |
| frank26080115 | 0:bf7b9fba3924 | 146 | } |
| frank26080115 | 0:bf7b9fba3924 | 147 | // no more data |
| frank26080115 | 0:bf7b9fba3924 | 148 | else { |
| frank26080115 | 0:bf7b9fba3924 | 149 | break; |
| frank26080115 | 0:bf7b9fba3924 | 150 | } |
| frank26080115 | 0:bf7b9fba3924 | 151 | } |
| frank26080115 | 0:bf7b9fba3924 | 152 | } |
| frank26080115 | 0:bf7b9fba3924 | 153 | |
| frank26080115 | 0:bf7b9fba3924 | 154 | |
| frank26080115 | 0:bf7b9fba3924 | 155 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 156 | * @brief UART Line Status Error |
| frank26080115 | 0:bf7b9fba3924 | 157 | * @param[in] bLSErrType UART Line Status Error Type |
| frank26080115 | 0:bf7b9fba3924 | 158 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 159 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 160 | void UART_IntErr(uint8_t bLSErrType) |
| frank26080115 | 0:bf7b9fba3924 | 161 | { |
| frank26080115 | 0:bf7b9fba3924 | 162 | if (bLSErrType & UART_LSR_PE){ |
| frank26080115 | 0:bf7b9fba3924 | 163 | UART_Send(LPC_UART0, p_err_menu, sizeof(p_err_menu), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 164 | } |
| frank26080115 | 0:bf7b9fba3924 | 165 | |
| frank26080115 | 0:bf7b9fba3924 | 166 | if (bLSErrType & UART_LSR_FE){ |
| frank26080115 | 0:bf7b9fba3924 | 167 | UART_Send(LPC_UART0, f_err_menu, sizeof(f_err_menu), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 168 | } |
| frank26080115 | 0:bf7b9fba3924 | 169 | } |
| frank26080115 | 0:bf7b9fba3924 | 170 | |
| frank26080115 | 0:bf7b9fba3924 | 171 | /*-------------------------PRIVATE FUNCTIONS------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 172 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 173 | * @brief UART read function for interrupt mode (using ring buffers) |
| frank26080115 | 0:bf7b9fba3924 | 174 | * @param[in] UARTPort Selected UART peripheral used to send data, |
| frank26080115 | 0:bf7b9fba3924 | 175 | * should be UART0 |
| frank26080115 | 0:bf7b9fba3924 | 176 | * @param[out] rxbuf Pointer to Received buffer |
| frank26080115 | 0:bf7b9fba3924 | 177 | * @param[in] buflen Length of Received buffer |
| frank26080115 | 0:bf7b9fba3924 | 178 | * @return Number of bytes actually read from the ring buffer |
| frank26080115 | 0:bf7b9fba3924 | 179 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 180 | uint32_t UARTReceive(LPC_UART_TypeDef *UARTPort, uint8_t *rxbuf, uint8_t buflen) |
| frank26080115 | 0:bf7b9fba3924 | 181 | { |
| frank26080115 | 0:bf7b9fba3924 | 182 | uint8_t *data = (uint8_t *) rxbuf; |
| frank26080115 | 0:bf7b9fba3924 | 183 | uint32_t bytes = 0; |
| frank26080115 | 0:bf7b9fba3924 | 184 | |
| frank26080115 | 0:bf7b9fba3924 | 185 | /* Temporarily lock out UART receive interrupts during this |
| frank26080115 | 0:bf7b9fba3924 | 186 | read so the UART receive interrupt won't cause problems |
| frank26080115 | 0:bf7b9fba3924 | 187 | with the index values */ |
| frank26080115 | 0:bf7b9fba3924 | 188 | UART_IntConfig(UARTPort, UART_INTCFG_RBR, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 189 | |
| frank26080115 | 0:bf7b9fba3924 | 190 | /* Loop until receive buffer ring is empty or |
| frank26080115 | 0:bf7b9fba3924 | 191 | until max_bytes expires */ |
| frank26080115 | 0:bf7b9fba3924 | 192 | while ((buflen > 0) && (!(__BUF_IS_EMPTY(rb.rx_head, rb.rx_tail)))) |
| frank26080115 | 0:bf7b9fba3924 | 193 | { |
| frank26080115 | 0:bf7b9fba3924 | 194 | /* Read data from ring buffer into user buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 195 | *data = rb.rx[rb.rx_tail]; |
| frank26080115 | 0:bf7b9fba3924 | 196 | data++; |
| frank26080115 | 0:bf7b9fba3924 | 197 | |
| frank26080115 | 0:bf7b9fba3924 | 198 | /* Update tail pointer */ |
| frank26080115 | 0:bf7b9fba3924 | 199 | __BUF_INCR(rb.rx_tail); |
| frank26080115 | 0:bf7b9fba3924 | 200 | |
| frank26080115 | 0:bf7b9fba3924 | 201 | /* Increment data count and decrement buffer size count */ |
| frank26080115 | 0:bf7b9fba3924 | 202 | bytes++; |
| frank26080115 | 0:bf7b9fba3924 | 203 | buflen--; |
| frank26080115 | 0:bf7b9fba3924 | 204 | } |
| frank26080115 | 0:bf7b9fba3924 | 205 | |
| frank26080115 | 0:bf7b9fba3924 | 206 | /* Re-enable UART interrupts */ |
| frank26080115 | 0:bf7b9fba3924 | 207 | UART_IntConfig(UARTPort, UART_INTCFG_RBR, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 208 | |
| frank26080115 | 0:bf7b9fba3924 | 209 | return bytes; |
| frank26080115 | 0:bf7b9fba3924 | 210 | } |
| frank26080115 | 0:bf7b9fba3924 | 211 | |
| frank26080115 | 0:bf7b9fba3924 | 212 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 213 | * @brief Print Welcome menu |
| frank26080115 | 0:bf7b9fba3924 | 214 | * @param[in] none |
| frank26080115 | 0:bf7b9fba3924 | 215 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 216 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 217 | void print_menu(void) |
| frank26080115 | 0:bf7b9fba3924 | 218 | { |
| frank26080115 | 0:bf7b9fba3924 | 219 | UART_Send(LPC_UART0, menu1, sizeof(menu1), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 220 | UART_Send(LPC_UART0, menu2, sizeof(menu2), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 221 | } |
| frank26080115 | 0:bf7b9fba3924 | 222 | |
| frank26080115 | 0:bf7b9fba3924 | 223 | |
| frank26080115 | 0:bf7b9fba3924 | 224 | |
| frank26080115 | 0:bf7b9fba3924 | 225 | /*-------------------------MAIN FUNCTION------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 226 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 227 | * @brief c_entry: Main UART-RS485 program body |
| frank26080115 | 0:bf7b9fba3924 | 228 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 229 | * @return int |
| frank26080115 | 0:bf7b9fba3924 | 230 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 231 | int c_entry(void) |
| frank26080115 | 0:bf7b9fba3924 | 232 | { |
| frank26080115 | 0:bf7b9fba3924 | 233 | // UART Configuration structure variable |
| frank26080115 | 0:bf7b9fba3924 | 234 | UART_CFG_Type UARTConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 235 | // UART FIFO configuration Struct variable |
| frank26080115 | 0:bf7b9fba3924 | 236 | UART_FIFO_CFG_Type UARTFIFOConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 237 | // Pin configuration |
| frank26080115 | 0:bf7b9fba3924 | 238 | PINSEL_CFG_Type PinCfg; |
| frank26080115 | 0:bf7b9fba3924 | 239 | // RS485 configuration |
| frank26080115 | 0:bf7b9fba3924 | 240 | UART1_RS485_CTRLCFG_Type rs485cfg; |
| frank26080115 | 0:bf7b9fba3924 | 241 | // Temp. data |
| frank26080115 | 0:bf7b9fba3924 | 242 | uint32_t idx, len; |
| frank26080115 | 0:bf7b9fba3924 | 243 | uint8_t buffer[10]; |
| frank26080115 | 0:bf7b9fba3924 | 244 | int32_t exit_flag, addr_toggle; |
| frank26080115 | 0:bf7b9fba3924 | 245 | |
| frank26080115 | 0:bf7b9fba3924 | 246 | // UART0 section ---------------------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 247 | /* |
| frank26080115 | 0:bf7b9fba3924 | 248 | * Initialize UART0 pin connect |
| frank26080115 | 0:bf7b9fba3924 | 249 | */ |
| frank26080115 | 0:bf7b9fba3924 | 250 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 251 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 252 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 253 | PinCfg.Pinnum = 2; |
| frank26080115 | 0:bf7b9fba3924 | 254 | PinCfg.Portnum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 255 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 256 | PinCfg.Pinnum = 3; |
| frank26080115 | 0:bf7b9fba3924 | 257 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 258 | |
| frank26080115 | 0:bf7b9fba3924 | 259 | /* Initialize UART Configuration parameter structure to default state: |
| frank26080115 | 0:bf7b9fba3924 | 260 | * Baudrate = 115200 bps |
| frank26080115 | 0:bf7b9fba3924 | 261 | * 8 data bit |
| frank26080115 | 0:bf7b9fba3924 | 262 | * 1 Stop bit |
| frank26080115 | 0:bf7b9fba3924 | 263 | * None parity |
| frank26080115 | 0:bf7b9fba3924 | 264 | */ |
| frank26080115 | 0:bf7b9fba3924 | 265 | UART_ConfigStructInit(&UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 266 | UARTConfigStruct.Baud_rate = 115200; |
| frank26080115 | 0:bf7b9fba3924 | 267 | |
| frank26080115 | 0:bf7b9fba3924 | 268 | // Initialize UART0 peripheral with given to corresponding parameter |
| frank26080115 | 0:bf7b9fba3924 | 269 | UART_Init(LPC_UART0, &UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 270 | |
| frank26080115 | 0:bf7b9fba3924 | 271 | /* Initialize FIFOConfigStruct to default state: |
| frank26080115 | 0:bf7b9fba3924 | 272 | * - FIFO_DMAMode = DISABLE |
| frank26080115 | 0:bf7b9fba3924 | 273 | * - FIFO_Level = UART_FIFO_TRGLEV0 |
| frank26080115 | 0:bf7b9fba3924 | 274 | * - FIFO_ResetRxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 275 | * - FIFO_ResetTxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 276 | * - FIFO_State = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 277 | */ |
| frank26080115 | 0:bf7b9fba3924 | 278 | UART_FIFOConfigStructInit(&UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 279 | |
| frank26080115 | 0:bf7b9fba3924 | 280 | // Initialize FIFO for UART0 peripheral |
| frank26080115 | 0:bf7b9fba3924 | 281 | UART_FIFOConfig(LPC_UART0, &UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 282 | |
| frank26080115 | 0:bf7b9fba3924 | 283 | // Enable UART Transmit |
| frank26080115 | 0:bf7b9fba3924 | 284 | UART_TxCmd(LPC_UART0, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 285 | |
| frank26080115 | 0:bf7b9fba3924 | 286 | // print welcome screen |
| frank26080115 | 0:bf7b9fba3924 | 287 | print_menu(); |
| frank26080115 | 0:bf7b9fba3924 | 288 | |
| frank26080115 | 0:bf7b9fba3924 | 289 | |
| frank26080115 | 0:bf7b9fba3924 | 290 | // UART1 - RS485 section ------------------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 291 | /* |
| frank26080115 | 0:bf7b9fba3924 | 292 | * Initialize UART1 pin connect |
| frank26080115 | 0:bf7b9fba3924 | 293 | */ |
| frank26080115 | 0:bf7b9fba3924 | 294 | PinCfg.Funcnum = 2; |
| frank26080115 | 0:bf7b9fba3924 | 295 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 296 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 297 | // TXD1 - P2.0 |
| frank26080115 | 0:bf7b9fba3924 | 298 | PinCfg.Pinnum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 299 | PinCfg.Portnum = 2; |
| frank26080115 | 0:bf7b9fba3924 | 300 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 301 | // RXD1 - P2.1 |
| frank26080115 | 0:bf7b9fba3924 | 302 | PinCfg.Pinnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 303 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 304 | // DTR1 - P2.5 |
| frank26080115 | 0:bf7b9fba3924 | 305 | PinCfg.Pinnum = 5; |
| frank26080115 | 0:bf7b9fba3924 | 306 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 307 | |
| frank26080115 | 0:bf7b9fba3924 | 308 | |
| frank26080115 | 0:bf7b9fba3924 | 309 | |
| frank26080115 | 0:bf7b9fba3924 | 310 | /* Initialize UART Configuration parameter structure to default state: |
| frank26080115 | 0:bf7b9fba3924 | 311 | * Baudrate = 9600 bps |
| frank26080115 | 0:bf7b9fba3924 | 312 | * 8 data bit |
| frank26080115 | 0:bf7b9fba3924 | 313 | * 1 Stop bit |
| frank26080115 | 0:bf7b9fba3924 | 314 | * Parity: None |
| frank26080115 | 0:bf7b9fba3924 | 315 | * Note: Parity will be enabled later in UART_RS485Config() function. |
| frank26080115 | 0:bf7b9fba3924 | 316 | */ |
| frank26080115 | 0:bf7b9fba3924 | 317 | UART_ConfigStructInit(&UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 318 | |
| frank26080115 | 0:bf7b9fba3924 | 319 | // Initialize UART0 peripheral with given to corresponding parameter |
| frank26080115 | 0:bf7b9fba3924 | 320 | UART_Init((LPC_UART_TypeDef *)LPC_UART1, &UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 321 | |
| frank26080115 | 0:bf7b9fba3924 | 322 | /* Initialize FIFOConfigStruct to default state: |
| frank26080115 | 0:bf7b9fba3924 | 323 | * - FIFO_DMAMode = DISABLE |
| frank26080115 | 0:bf7b9fba3924 | 324 | * - FIFO_Level = UART_FIFO_TRGLEV0 |
| frank26080115 | 0:bf7b9fba3924 | 325 | * - FIFO_ResetRxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 326 | * - FIFO_ResetTxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 327 | * - FIFO_State = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 328 | */ |
| frank26080115 | 0:bf7b9fba3924 | 329 | UART_FIFOConfigStructInit(&UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 330 | |
| frank26080115 | 0:bf7b9fba3924 | 331 | // Initialize FIFO for UART0 peripheral |
| frank26080115 | 0:bf7b9fba3924 | 332 | UART_FIFOConfig((LPC_UART_TypeDef *)LPC_UART1, &UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 333 | |
| frank26080115 | 0:bf7b9fba3924 | 334 | // Configure RS485 |
| frank26080115 | 0:bf7b9fba3924 | 335 | /* |
| frank26080115 | 0:bf7b9fba3924 | 336 | * - Auto Direction in Tx/Rx driving is enabled |
| frank26080115 | 0:bf7b9fba3924 | 337 | * - Direction control pin is set to DTR1 |
| frank26080115 | 0:bf7b9fba3924 | 338 | * - Direction control pole is set to "1" that means direction pin |
| frank26080115 | 0:bf7b9fba3924 | 339 | * will drive to high state before transmit data. |
| frank26080115 | 0:bf7b9fba3924 | 340 | * - Multidrop mode is disable |
| frank26080115 | 0:bf7b9fba3924 | 341 | * - Auto detect address is disabled |
| frank26080115 | 0:bf7b9fba3924 | 342 | * - Receive state is enable |
| frank26080115 | 0:bf7b9fba3924 | 343 | */ |
| frank26080115 | 0:bf7b9fba3924 | 344 | rs485cfg.AutoDirCtrl_State = ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 345 | rs485cfg.DirCtrlPin = UART1_RS485_DIRCTRL_DTR; |
| frank26080115 | 0:bf7b9fba3924 | 346 | rs485cfg.DirCtrlPol_Level = SET; |
| frank26080115 | 0:bf7b9fba3924 | 347 | rs485cfg.DelayValue = 50; |
| frank26080115 | 0:bf7b9fba3924 | 348 | rs485cfg.NormalMultiDropMode_State = DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 349 | rs485cfg.AutoAddrDetect_State = DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 350 | rs485cfg.MatchAddrValue = 0; |
| frank26080115 | 0:bf7b9fba3924 | 351 | rs485cfg.Rx_State = ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 352 | UART_RS485Config(LPC_UART1, &rs485cfg); |
| frank26080115 | 0:bf7b9fba3924 | 353 | |
| frank26080115 | 0:bf7b9fba3924 | 354 | /* Enable UART Rx interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 355 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART_INTCFG_RBR, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 356 | /* Enable UART line status interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 357 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART_INTCFG_RLS, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 358 | |
| frank26080115 | 0:bf7b9fba3924 | 359 | /* preemption = 1, sub-priority = 1 */ |
| frank26080115 | 0:bf7b9fba3924 | 360 | NVIC_SetPriority(UART1_IRQn, ((0x01<<3)|0x01)); |
| frank26080115 | 0:bf7b9fba3924 | 361 | /* Enable Interrupt for UART0 channel */ |
| frank26080115 | 0:bf7b9fba3924 | 362 | NVIC_EnableIRQ(UART1_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 363 | |
| frank26080115 | 0:bf7b9fba3924 | 364 | // Enable UART Transmit |
| frank26080115 | 0:bf7b9fba3924 | 365 | UART_TxCmd((LPC_UART_TypeDef *)LPC_UART1, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 366 | |
| frank26080115 | 0:bf7b9fba3924 | 367 | addr_toggle = 1; |
| frank26080115 | 0:bf7b9fba3924 | 368 | // for testing... |
| frank26080115 | 0:bf7b9fba3924 | 369 | while (1){ |
| frank26080115 | 0:bf7b9fba3924 | 370 | |
| frank26080115 | 0:bf7b9fba3924 | 371 | // Send slave addr ----------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 372 | UART_Send(LPC_UART0, send_menu, sizeof(send_menu), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 373 | // Send slave addr on RS485 bus |
| frank26080115 | 0:bf7b9fba3924 | 374 | if (addr_toggle){ |
| frank26080115 | 0:bf7b9fba3924 | 375 | UART_RS485SendSlvAddr(LPC_UART1, SLAVE_ADDR_A); |
| frank26080115 | 0:bf7b9fba3924 | 376 | } else { |
| frank26080115 | 0:bf7b9fba3924 | 377 | UART_RS485SendSlvAddr(LPC_UART1, SLAVE_ADDR_B); |
| frank26080115 | 0:bf7b9fba3924 | 378 | } |
| frank26080115 | 0:bf7b9fba3924 | 379 | // delay for a while |
| frank26080115 | 0:bf7b9fba3924 | 380 | for (len = 0; len < 1000; len++); |
| frank26080115 | 0:bf7b9fba3924 | 381 | |
| frank26080115 | 0:bf7b9fba3924 | 382 | // Send data ----------------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 383 | if (addr_toggle){ |
| frank26080115 | 0:bf7b9fba3924 | 384 | UART_RS485SendData(LPC_UART1, slaveA_msg, sizeof(slaveA_msg)); |
| frank26080115 | 0:bf7b9fba3924 | 385 | } else { |
| frank26080115 | 0:bf7b9fba3924 | 386 | UART_RS485SendData(LPC_UART1, slaveB_msg, sizeof(slaveB_msg)); |
| frank26080115 | 0:bf7b9fba3924 | 387 | } |
| frank26080115 | 0:bf7b9fba3924 | 388 | // Send terminator |
| frank26080115 | 0:bf7b9fba3924 | 389 | UART_RS485SendData(LPC_UART1, &terminator, 1); |
| frank26080115 | 0:bf7b9fba3924 | 390 | // delay for a while |
| frank26080115 | 0:bf7b9fba3924 | 391 | for (len = 0; len < 1000; len++); |
| frank26080115 | 0:bf7b9fba3924 | 392 | |
| frank26080115 | 0:bf7b9fba3924 | 393 | // Receive data from slave -------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 394 | UART_Send(LPC_UART0, recv_menu, sizeof(recv_menu), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 395 | // If address 'A' required response... |
| frank26080115 | 0:bf7b9fba3924 | 396 | if (addr_toggle){ |
| frank26080115 | 0:bf7b9fba3924 | 397 | exit_flag = 0; |
| frank26080115 | 0:bf7b9fba3924 | 398 | while (!exit_flag){ |
| frank26080115 | 0:bf7b9fba3924 | 399 | len = UARTReceive((LPC_UART_TypeDef *)LPC_UART1, buffer, sizeof(buffer)); |
| frank26080115 | 0:bf7b9fba3924 | 400 | /* Got some data */ |
| frank26080115 | 0:bf7b9fba3924 | 401 | idx = 0; |
| frank26080115 | 0:bf7b9fba3924 | 402 | while (idx < len) |
| frank26080115 | 0:bf7b9fba3924 | 403 | { |
| frank26080115 | 0:bf7b9fba3924 | 404 | if (buffer[idx] == 13){ |
| frank26080115 | 0:bf7b9fba3924 | 405 | exit_flag = 1; |
| frank26080115 | 0:bf7b9fba3924 | 406 | } else { |
| frank26080115 | 0:bf7b9fba3924 | 407 | /* Echo it back */ |
| frank26080115 | 0:bf7b9fba3924 | 408 | UART_Send(LPC_UART0, &buffer[idx], 1, BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 409 | } |
| frank26080115 | 0:bf7b9fba3924 | 410 | idx++; |
| frank26080115 | 0:bf7b9fba3924 | 411 | } |
| frank26080115 | 0:bf7b9fba3924 | 412 | } |
| frank26080115 | 0:bf7b9fba3924 | 413 | } |
| frank26080115 | 0:bf7b9fba3924 | 414 | |
| frank26080115 | 0:bf7b9fba3924 | 415 | UART_Send(LPC_UART0, nextline, sizeof(nextline), BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 416 | addr_toggle = (addr_toggle ? 0 : 1); |
| frank26080115 | 0:bf7b9fba3924 | 417 | // long delay here |
| frank26080115 | 0:bf7b9fba3924 | 418 | for (len = 0; len < 10000000; len++); |
| frank26080115 | 0:bf7b9fba3924 | 419 | } |
| frank26080115 | 0:bf7b9fba3924 | 420 | |
| frank26080115 | 0:bf7b9fba3924 | 421 | return 1; |
| frank26080115 | 0:bf7b9fba3924 | 422 | } |
| frank26080115 | 0:bf7b9fba3924 | 423 | |
| frank26080115 | 0:bf7b9fba3924 | 424 | /* With ARM and GHS toolsets, the entry point is main() - this will |
| frank26080115 | 0:bf7b9fba3924 | 425 | allow the linker to generate wrapper code to setup stacks, allocate |
| frank26080115 | 0:bf7b9fba3924 | 426 | heap area, and initialize and copy code and data segments. For GNU |
| frank26080115 | 0:bf7b9fba3924 | 427 | toolsets, the entry point is through __start() in the crt0_gnu.asm |
| frank26080115 | 0:bf7b9fba3924 | 428 | file, and that startup code will setup stacks and data */ |
| frank26080115 | 0:bf7b9fba3924 | 429 | int main(void) |
| frank26080115 | 0:bf7b9fba3924 | 430 | { |
| frank26080115 | 0:bf7b9fba3924 | 431 | return c_entry(); |
| frank26080115 | 0:bf7b9fba3924 | 432 | } |
| frank26080115 | 0:bf7b9fba3924 | 433 | |
| frank26080115 | 0:bf7b9fba3924 | 434 | |
| frank26080115 | 0:bf7b9fba3924 | 435 | #ifdef DEBUG |
| frank26080115 | 0:bf7b9fba3924 | 436 | /******************************************************************************* |
| frank26080115 | 0:bf7b9fba3924 | 437 | * @brief Reports the name of the source file and the source line number |
| frank26080115 | 0:bf7b9fba3924 | 438 | * where the CHECK_PARAM error has occurred. |
| frank26080115 | 0:bf7b9fba3924 | 439 | * @param[in] file Pointer to the source file name |
| frank26080115 | 0:bf7b9fba3924 | 440 | * @param[in] line assert_param error line source number |
| frank26080115 | 0:bf7b9fba3924 | 441 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 442 | *******************************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 443 | void check_failed(uint8_t *file, uint32_t line) |
| frank26080115 | 0:bf7b9fba3924 | 444 | { |
| frank26080115 | 0:bf7b9fba3924 | 445 | /* User can add his own implementation to report the file name and line number, |
| frank26080115 | 0:bf7b9fba3924 | 446 | ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
| frank26080115 | 0:bf7b9fba3924 | 447 | |
| frank26080115 | 0:bf7b9fba3924 | 448 | /* Infinite loop */ |
| frank26080115 | 0:bf7b9fba3924 | 449 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 450 | } |
| frank26080115 | 0:bf7b9fba3924 | 451 | #endif |
| frank26080115 | 0:bf7b9fba3924 | 452 | |
| frank26080115 | 0:bf7b9fba3924 | 453 | /* |
| frank26080115 | 0:bf7b9fba3924 | 454 | * @} |
| frank26080115 | 0:bf7b9fba3924 | 455 | */ |