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00097 #include "board.h"
00098
00099 #include <stdbool.h>
00100 #include <stdio.h>
00101 #include <string.h>
00102
00103
00104
00105
00106
00107
00108
00109
00110 #define PINS_USART_MASTER PIN_USART0_TXD, PIN_USART0_RXD, PIN_USART0_SCK, PIN_USART0_RTS
00111 #define PINS_USART_SLAVE PIN_USART0_TXD, PIN_USART0_RXD, PIN_USART0_SCK, PIN_USART0_CTS
00112
00113
00114 #define PINS_SPI0_MASTER PIN_SPI_MISO, PIN_SPI_MOSI, PIN_SPI_SPCK, PIN_SPI_NPCS1
00115 #define PINS_SPI0_SLAVE PIN_SPI_MISO, PIN_SPI_MOSI, PIN_SPI_SPCK, PIN_SPI_NPCS0
00116
00117
00118 #define USART USART0
00119 #define ID_USART ID_USART0
00120 #define USART_IRQn USART0_IRQn
00121 #define USART_Handler USART0_Handler
00122
00123
00124 #define SPI SPI0
00125 #define ID_SPI ID_SPI0
00126 #define SPI_IRQn SPI0_IRQn
00127 #define SPI_Handler SPI0_Handler
00128
00129
00130
00131
00132
00133
00134 char pTxBuffer1[] = {"ABCDEFGHIJKLMNOPQRSTUVWXYZ\n\r"};
00135 char pTxBuffer2[] = {"abcdefghijklmnopqrstuvwxyz\n\r"};
00136
00137
00138 const Pin pins1[] = {PINS_USART_MASTER, PINS_SPI0_SLAVE};
00139 const Pin pins2[] = {PINS_USART_SLAVE, PINS_SPI0_MASTER};
00140
00141
00142 static uint32_t spiClock = 5000000;
00143
00144
00145 static uint32_t baudRate = 5000000;
00146
00147
00148
00149
00150
00151
00152
00153 void SPI_Handler()
00154 {
00155 SPI_GetStatus(SPI);
00156
00157 printf("%c", (char) SPI_Read(SPI));
00158 }
00159
00160
00161
00162
00163 void USART_Handler(void)
00164 {
00165 volatile uint32_t status;
00166 status = USART_GetStatus(USART);
00167 if ((status & 0x1) == 1)
00168 {
00169 printf("%c", USART_Read( USART, 0));
00170 }
00171 }
00172
00173
00174
00175
00176
00177
00178
00179
00180
00181 static void USART_SPI_SetBaudrate(Usart *pUsart,
00182 uint32_t baudrate,
00183 uint32_t masterClock)
00184 {
00185 unsigned int CD, FP;
00186
00187
00188 CD = (masterClock / baudrate);
00189 FP = ((masterClock / baudrate) - CD);
00190
00191 pUsart->US_BRGR = ( US_BRGR_CD(CD) | US_BRGR_FP(FP));
00192 }
00193
00194
00195
00196
00197
00198
00199
00200
00201
00202
00203 static void USART_SPI_Configure(Usart *pUsart,
00204 uint32_t mode,
00205 uint32_t baudrate,
00206 uint32_t masterClock)
00207 {
00208
00209
00210 pUsart->US_CR = US_CR_RSTRX | US_CR_RSTTX
00211 | US_CR_RXDIS | US_CR_TXDIS | US_CR_RSTSTA;
00212
00213 pUsart->US_IDR = 0xFFFFFFFF;
00214
00215
00216 USART_SPI_SetBaudrate(pUsart, baudrate, masterClock);
00217
00218
00219 pUsart->US_MR = mode;
00220
00221
00222 pUsart->US_CR = US_CR_RXEN | US_CR_TXEN;
00223
00224
00225
00226 #if ( defined (__GNUC__) && !defined (__SAMBA__) )
00227 setvbuf(stdout, (char *)NULL, _IONBF, 0);
00228 #endif
00229
00230 }
00231
00232
00233
00234
00235 static void _ConfigureSpiSlave( void )
00236 {
00237
00238 SPI_Configure(SPI, ID_SPI, SPI_PCS( 0 ));
00239
00240 NVIC_ClearPendingIRQ(SPI_IRQn);
00241 NVIC_SetPriority( SPI_IRQn ,1);
00242 NVIC_EnableIRQ(SPI_IRQn);
00243 SPI_DisableIt(SPI, 0xffffffff);
00244
00245 SPI_ConfigureNPCS( SPI, 0, 0);
00246 }
00247
00248
00249
00250
00251 static void _ConfigureUsartAsSpiMaster(void)
00252 {
00253 uint32_t usartMode;
00254
00255 usartMode = 0
00256 | US_MR_USART_MODE_SPI_MASTER
00257 | US_MR_USCLKS_MCK
00258 | US_MR_CHRL_8_BIT
00259 | US_SPI_BPMODE_1
00260 | US_MR_CLKO;
00261
00262
00263 PMC_EnablePeripheral(ID_USART);
00264 USART_SPI_Configure ( USART, usartMode, baudRate, BOARD_MCK);
00265
00266 NVIC_ClearPendingIRQ(USART_IRQn);
00267 NVIC_SetPriority( USART_IRQn ,1);
00268 NVIC_EnableIRQ(USART_IRQn);
00269 USART_DisableIt(USART, 0xffffffff);
00270 }
00271
00272
00273
00274
00275 static void _ConfigureSpiMaster( void )
00276 {
00277
00278 SPI_Configure(SPI, ID_SPI, (SPI_MR_MSTR | SPI_MR_MODFDIS | SPI_PCS( 1 )));
00279
00280 NVIC_ClearPendingIRQ(SPI_IRQn);
00281 NVIC_SetPriority( SPI_IRQn ,1);
00282 NVIC_EnableIRQ(SPI_IRQn);
00283 SPI_DisableIt(SPI, 0xffffffff);
00284
00285 SPI_ConfigureNPCS( SPI, 1,
00286 SPI_DLYBCT( 100, BOARD_MCK ) |
00287 SPI_DLYBS(100, BOARD_MCK) |
00288 SPI_SCBR( spiClock, BOARD_MCK) |
00289 SPI_CSR_BITS_8_BIT ) ;
00290 }
00291
00292
00293
00294
00295 static void _ConfigureUsartAsSpiSlave(void)
00296 {
00297 uint32_t usartMode;
00298
00299 usartMode = 0
00300 | US_MR_USART_MODE_SPI_SLAVE
00301 | US_MR_CHRL_8_BIT
00302 | US_SPI_BPMODE_1;
00303 PMC_EnablePeripheral(ID_USART);
00304 USART_SPI_Configure ( USART, usartMode, spiClock, BOARD_MCK);
00305
00306 NVIC_ClearPendingIRQ(USART_IRQn);
00307 NVIC_SetPriority( USART_IRQn ,1);
00308 NVIC_EnableIRQ(USART_IRQn);
00309 USART_DisableIt(USART, 0xffffffff);
00310 }
00311
00312
00313
00314
00315 static void _DisplayMainmenu( void )
00316 {
00317 printf("\n\rMenu :\n\r");
00318 printf("------\n\r");
00319 printf(" - M: Configure USART as spi master\n\r");
00320 printf(" - S: Configure USART as spi slave\n\r");
00321 printf(" - H: Display this menu \n\r");
00322 }
00323
00324
00325
00326
00327
00328
00329
00330
00331 extern int main( void )
00332 {
00333
00334 uint8_t ucKey, i ;
00335
00336
00337 WDT_Disable( WDT ) ;
00338
00339 SCB_EnableICache();
00340 SCB_EnableDCache();
00341
00342
00343 TimeTick_Configure ();
00344
00345
00346 printf( "-- USART SPI Example %s --\n\r", SOFTPACK_VERSION ) ;
00347 printf( "-- %s\n\r", BOARD_NAME ) ;
00348 printf( "-- Compiled: %s %s With %s--\n\r", __DATE__, __TIME__ , COMPILER_NAME) ;
00349
00350
00351 _DisplayMainmenu();
00352
00353 while ( 1 )
00354 {
00355 ucKey = DBG_GetChar() ;
00356 switch ( ucKey )
00357 {
00358
00359 case 'm': case 'M':
00360 {
00361
00362 PIO_Configure( pins1, PIO_LISTSIZE( pins1 ) ) ;
00363
00364
00365 _ConfigureUsartAsSpiMaster();
00366
00367
00368 _ConfigureSpiSlave();
00369
00370 printf( "-I- Configure USART as spi master ...\n\r" ) ;
00371
00372 SPI_EnableIt(SPI, SPI_IER_RDRF);
00373 SPI_Enable(SPI);
00374
00375 USART_EnableIt(USART, UART_IER_RXRDY);
00376
00377 for (i = 0;(pTxBuffer1[i]!='\0' && pTxBuffer2[i]!='\0'); i++)
00378 {
00379 while ( (SPI->SPI_SR & SPI_SR_TXEMPTY) == 0 ) ;
00380 SPI->SPI_TDR = ((uint16_t)pTxBuffer2[i]) | SPI_PCS( 0 ) ;
00381
00382 USART_Write( USART, pTxBuffer1[i], 0);
00383
00384 }
00385 break ;
00386 }
00387
00388 case 's': case 'S':
00389 {
00390 printf( "-I- Configure USART as spi slave...\n\r" ) ;
00391
00392
00393 PIO_Configure( pins2, PIO_LISTSIZE( pins2 ) ) ;
00394
00395
00396 _ConfigureUsartAsSpiSlave();
00397
00398
00399 _ConfigureSpiMaster();
00400
00401 USART_EnableIt(USART, UART_IER_RXRDY);
00402
00403 SPI_EnableIt(SPI, SPI_IER_RDRF);
00404 SPI_Enable(SPI);
00405
00406 for (i = 0;(pTxBuffer1[i]!='\0' && pTxBuffer2[i]!='\0'); i++)
00407 {
00408 USART_Write( USART, (uint16_t)pTxBuffer2[i], 0);
00409
00410 SPI_Write( SPI, 1, (uint16_t)pTxBuffer1[i]);
00411 }
00412 break;
00413 }
00414 case 'h': case 'H':
00415 {
00416 _DisplayMainmenu();
00417 break;
00418 }
00419 }
00420 }
00421 }
00422