1 //* ----------------------------------------------------------------------------
2 //* ATMEL Microcontroller Software Support - ROUSSET -
3 //* ----------------------------------------------------------------------------
4 //* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
5 //* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
6 //* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
7 //* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
8 //* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
9 //* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
10 //* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
11 //* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
12 //* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
13 //* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
14 //* ----------------------------------------------------------------------------
15 //* File Name : lib_AT91SAM7S64.h
16 //* Object : AT91SAM7S64 inlined functions
17 //* Generated : AT91 SW Application Group 08/30/2005 (15:52:59)
20 #include <sys/types.h>
21 #include <include/AT91SAM7.h>
22 #include <include/lib_AT91SAM7.h>
24 //*----------------------------------------------------------------------------
25 //* \fn AT91F_AIC_ConfigureIt
26 //* \brief Interrupt Handler Initialization
27 //*----------------------------------------------------------------------------
28 unsigned int AT91F_AIC_ConfigureIt (
29 AT91PS_AIC pAic, // \arg pointer to the AIC registers
30 unsigned int irq_id, // \arg interrupt number to initialize
31 unsigned int priority, // \arg priority to give to the interrupt
32 unsigned int src_type, // \arg activation and sense of activation
33 void (*newHandler) () ) // \arg address of the interrupt handler
35 unsigned int oldHandler;
38 oldHandler = pAic->AIC_SVR[irq_id];
40 mask = 0x1 << irq_id ;
41 //* Disable the interrupt on the interrupt controller
42 pAic->AIC_IDCR = mask ;
43 //* Save the interrupt handler routine pointer and the interrupt priority
44 pAic->AIC_SVR[irq_id] = (unsigned int) newHandler ;
45 //* Store the Source Mode Register
46 pAic->AIC_SMR[irq_id] = src_type | priority ;
47 //* Clear the interrupt on the interrupt controller
48 pAic->AIC_ICCR = mask ;
53 //*----------------------------------------------------------------------------
54 //* \fn AT91F_AIC_SetExceptionVector
55 //* \brief Configure vector handler
56 //*----------------------------------------------------------------------------
57 unsigned int AT91F_AIC_SetExceptionVector (
58 unsigned int *pVector, // \arg pointer to the AIC registers
59 void (*Handler) () ) // \arg Interrupt Handler
61 unsigned int oldVector = *pVector;
63 if ((unsigned int) Handler == (unsigned int) AT91C_AIC_BRANCH_OPCODE)
64 *pVector = (unsigned int) AT91C_AIC_BRANCH_OPCODE;
66 *pVector = (((((unsigned int) Handler) - ((unsigned int) pVector) - 0x8) >> 2) & 0x00FFFFFF) | 0xEA000000;
71 //*----------------------------------------------------------------------------
72 //* \fn AT91F_AIC_Open
73 //* \brief Set exception vectors and AIC registers to default values
74 //*----------------------------------------------------------------------------
76 AT91PS_AIC pAic, // \arg pointer to the AIC registers
77 void (*IrqHandler) (), // \arg Default IRQ vector exception
78 void (*FiqHandler) (), // \arg Default FIQ vector exception
79 void (*DefaultHandler) (), // \arg Default Handler set in ISR
80 void (*SpuriousHandler) (), // \arg Default Spurious Handler
81 unsigned int protectMode) // \arg Debug Control Register
85 // Disable all interrupts and set IVR to the default handler
86 for (i = 0; i < 32; ++i) {
87 AT91F_AIC_DisableIt(pAic, i);
88 AT91F_AIC_ConfigureIt(pAic, i, AT91C_AIC_PRIOR_LOWEST, AT91C_AIC_SRCTYPE_HIGH_LEVEL, DefaultHandler);
91 // Set the IRQ exception vector
92 AT91F_AIC_SetExceptionVector((unsigned int *) 0x18, IrqHandler);
93 // Set the Fast Interrupt exception vector
94 AT91F_AIC_SetExceptionVector((unsigned int *) 0x1C, FiqHandler);
96 pAic->AIC_SPU = (unsigned int) SpuriousHandler;
97 pAic->AIC_DCR = protectMode;
100 //*----------------------------------------------------------------------------
101 //* \fn AT91F_PDC_Open
102 //* \brief Open PDC: disable TX and RX reset transfer descriptors, re-enable RX and TX
103 //*----------------------------------------------------------------------------
104 void AT91F_PDC_Open(AT91PS_PDC pPDC) // \arg pointer to a PDC controller
106 //* Disable the RX and TX PDC transfer requests
107 AT91F_PDC_DisableRx(pPDC);
108 AT91F_PDC_DisableTx(pPDC);
110 //* Reset all Counter register Next buffer first
111 AT91F_PDC_SetNextTx(pPDC, NULL, 0);
112 AT91F_PDC_SetNextRx(pPDC, NULL, 0);
113 AT91F_PDC_SetTx(pPDC, NULL, 0);
114 AT91F_PDC_SetRx(pPDC, NULL, 0);
116 //* Enable the RX and TX PDC transfer requests
117 AT91F_PDC_EnableRx(pPDC);
118 AT91F_PDC_EnableTx(pPDC);
121 //*----------------------------------------------------------------------------
122 //* \fn AT91F_PDC_Close
123 //* \brief Close PDC: disable TX and RX reset transfer descriptors
124 //*----------------------------------------------------------------------------
125 void AT91F_PDC_Close(AT91PS_PDC pPDC) // \arg pointer to a PDC controller
127 //* Disable the RX and TX PDC transfer requests
128 AT91F_PDC_DisableRx(pPDC);
129 AT91F_PDC_DisableTx(pPDC);
131 //* Reset all Counter register Next buffer first
132 AT91F_PDC_SetNextTx(pPDC, NULL, 0);
133 AT91F_PDC_SetNextRx(pPDC, NULL, 0);
134 AT91F_PDC_SetTx(pPDC, NULL, 0);
135 AT91F_PDC_SetRx(pPDC, NULL, 0);
139 //*----------------------------------------------------------------------------
140 //* \fn AT91F_PDC_SendFrame
141 //* \brief Close PDC: disable TX and RX reset transfer descriptors
142 //*----------------------------------------------------------------------------
143 unsigned int AT91F_PDC_SendFrame(
145 const unsigned char *pBuffer,
146 unsigned int szBuffer,
147 const unsigned char *pNextBuffer,
148 unsigned int szNextBuffer )
150 if (AT91F_PDC_IsTxEmpty(pPDC)) {
151 //* Buffer and next buffer can be initialized
152 AT91F_PDC_SetTx(pPDC, pBuffer, szBuffer);
153 AT91F_PDC_SetNextTx(pPDC, pNextBuffer, szNextBuffer);
156 else if (AT91F_PDC_IsNextTxEmpty(pPDC)) {
157 //* Only one buffer can be initialized
158 AT91F_PDC_SetNextTx(pPDC, pBuffer, szBuffer);
162 //* All buffer are in use...
167 //*----------------------------------------------------------------------------
168 //* \fn AT91F_PDC_ReceiveFrame
169 //* \brief Close PDC: disable TX and RX reset transfer descriptors
170 //*----------------------------------------------------------------------------
171 unsigned int AT91F_PDC_ReceiveFrame (
173 unsigned char *pBuffer,
174 unsigned int szBuffer,
175 unsigned char *pNextBuffer,
176 unsigned int szNextBuffer )
178 if (AT91F_PDC_IsRxEmpty(pPDC)) {
179 //* Buffer and next buffer can be initialized
180 AT91F_PDC_SetRx(pPDC, pBuffer, szBuffer);
181 AT91F_PDC_SetNextRx(pPDC, pNextBuffer, szNextBuffer);
184 else if (AT91F_PDC_IsNextRxEmpty(pPDC)) {
185 //* Only one buffer can be initialized
186 AT91F_PDC_SetNextRx(pPDC, pBuffer, szBuffer);
190 //* All buffer are in use...
195 //*------------------------------------------------------------------------------
196 //* \fn AT91F_PMC_GetMasterClock
197 //* \brief Return master clock in Hz which correponds to processor clock for ARM7
198 //*------------------------------------------------------------------------------
199 unsigned int AT91F_PMC_GetMasterClock (
200 AT91PS_PMC pPMC, // \arg pointer to PMC controller
201 AT91PS_CKGR pCKGR, // \arg pointer to CKGR controller
202 unsigned int slowClock) // \arg slowClock in Hz
204 unsigned int reg = pPMC->PMC_MCKR;
205 unsigned int prescaler = (1 << ((reg & AT91C_PMC_PRES) >> 2));
206 unsigned int pllDivider, pllMultiplier;
208 switch (reg & AT91C_PMC_CSS) {
209 case AT91C_PMC_CSS_SLOW_CLK: // Slow clock selected
210 return slowClock / prescaler;
211 case AT91C_PMC_CSS_MAIN_CLK: // Main clock is selected
212 return AT91F_CKGR_GetMainClock(pCKGR, slowClock) / prescaler;
213 case AT91C_PMC_CSS_PLL_CLK: // PLLB clock is selected
214 reg = pCKGR->CKGR_PLLR;
215 pllDivider = (reg & AT91C_CKGR_DIV);
216 pllMultiplier = ((reg & AT91C_CKGR_MUL) >> 16) + 1;
217 return AT91F_CKGR_GetMainClock(pCKGR, slowClock) / pllDivider * pllMultiplier / prescaler;
222 //*--------------------------------------------------------------------------------------
223 //* \fn AT91F_RTT_ReadValue()
224 //* \brief Read the RTT value
225 //*--------------------------------------------------------------------------------------
226 unsigned int AT91F_RTTReadValue(AT91PS_RTTC pRTTC)
228 register volatile unsigned int val1,val2;
231 val1 = pRTTC->RTTC_RTVR;
232 val2 = pRTTC->RTTC_RTVR;
238 //*----------------------------------------------------------------------------
239 //* \fn AT91F_SPI_Close
240 //* \brief Close SPI: disable IT disable transfert, close PDC
241 //*----------------------------------------------------------------------------
242 void AT91F_SPI_Close(AT91PS_SPI pSPI) // \arg pointer to a SPI controller
244 //* Reset all the Chip Select register
245 pSPI->SPI_CSR[0] = 0 ;
246 pSPI->SPI_CSR[1] = 0 ;
247 pSPI->SPI_CSR[2] = 0 ;
248 pSPI->SPI_CSR[3] = 0 ;
250 //* Reset the SPI mode
253 //* Disable all interrupts
254 pSPI->SPI_IDR = 0xFFFFFFFF ;
256 //* Abort the Peripheral Data Transfers
257 AT91F_PDC_Close((AT91PS_PDC) &(pSPI->SPI_RPR));
259 //* Disable receiver and transmitter and stop any activity immediately
260 pSPI->SPI_CR = AT91C_SPI_SPIDIS;
263 //*----------------------------------------------------------------------------
264 //* \fn AT91F_ADC_CfgTimings
265 //* \brief Configure the different necessary timings of the ADC controller
266 //*----------------------------------------------------------------------------
267 void AT91F_ADC_CfgTimings (
268 AT91PS_ADC pADC, // pointer to a ADC controller
269 unsigned int mck_clock, // in MHz
270 unsigned int adc_clock, // in MHz
271 unsigned int startup_time, // in us
272 unsigned int sample_and_hold_time) // in ns
274 unsigned int prescal,startup,shtim;
276 prescal = mck_clock/(2*adc_clock) - 1;
277 startup = adc_clock*startup_time/8 - 1;
278 shtim = adc_clock*sample_and_hold_time/1000 - 1;
280 //* Write to the MR register
281 pADC->ADC_MR = ( (prescal<<8) & AT91C_ADC_PRESCAL) | ( (startup<<16) & AT91C_ADC_STARTUP) | ( (shtim<<24) & AT91C_ADC_SHTIM);
284 //*----------------------------------------------------------------------------
285 //* \fn AT91F_SSC_SetBaudrate
286 //* \brief Set the baudrate according to the CPU clock
287 //*----------------------------------------------------------------------------
288 void AT91F_SSC_SetBaudrate (
289 AT91PS_SSC pSSC, // \arg pointer to a SSC controller
290 unsigned int mainClock, // \arg peripheral clock
291 unsigned int speed) // \arg SSC baudrate
293 unsigned int baud_value;
294 //* Define the baud rate divisor register
299 baud_value = (unsigned int) (mainClock * 10)/(2*speed);
300 if ((baud_value % 10) >= 5)
301 baud_value = (baud_value / 10) + 1;
306 pSSC->SSC_CMR = baud_value;
309 //*----------------------------------------------------------------------------
310 //* \fn AT91F_SSC_Configure
311 //* \brief Configure SSC
312 //*----------------------------------------------------------------------------
313 void AT91F_SSC_Configure (
314 AT91PS_SSC pSSC, // \arg pointer to a SSC controller
315 unsigned int syst_clock, // \arg System Clock Frequency
316 unsigned int baud_rate, // \arg Expected Baud Rate Frequency
317 unsigned int clock_rx, // \arg Receiver Clock Parameters
318 unsigned int mode_rx, // \arg mode Register to be programmed
319 unsigned int clock_tx, // \arg Transmitter Clock Parameters
320 unsigned int mode_tx) // \arg mode Register to be programmed
322 //* Disable interrupts
323 pSSC->SSC_IDR = (unsigned int) -1;
325 //* Reset receiver and transmitter
326 pSSC->SSC_CR = AT91C_SSC_SWRST | AT91C_SSC_RXDIS | AT91C_SSC_TXDIS ;
328 //* Define the Clock Mode Register
329 AT91F_SSC_SetBaudrate(pSSC, syst_clock, baud_rate);
331 //* Write the Receive Clock Mode Register
332 pSSC->SSC_RCMR = clock_rx;
334 //* Write the Transmit Clock Mode Register
335 pSSC->SSC_TCMR = clock_tx;
337 //* Write the Receive Frame Mode Register
338 pSSC->SSC_RFMR = mode_rx;
340 //* Write the Transmit Frame Mode Register
341 pSSC->SSC_TFMR = mode_tx;
343 //* Clear Transmit and Receive Counters
344 AT91F_PDC_Open((AT91PS_PDC) &(pSSC->SSC_RPR));
349 //*----------------------------------------------------------------------------
350 //* \fn AT91F_US_Configure
351 //* \brief Configure USART
352 //*----------------------------------------------------------------------------
353 void AT91F_US_Configure (
354 AT91PS_USART pUSART, // \arg pointer to a USART controller
355 unsigned int mainClock, // \arg peripheral clock
356 unsigned int mode , // \arg mode Register to be programmed
357 unsigned int baudRate , // \arg baudrate to be programmed
358 unsigned int timeguard ) // \arg timeguard to be programmed
360 //* Disable interrupts
361 pUSART->US_IDR = (unsigned int) -1;
363 //* Reset receiver and transmitter
364 pUSART->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX | AT91C_US_RXDIS | AT91C_US_TXDIS ;
366 //* Define the baud rate divisor register
367 AT91F_US_SetBaudrate(pUSART, mainClock, baudRate);
369 //* Write the Timeguard Register
370 AT91F_US_SetTimeguard(pUSART, timeguard);
372 //* Clear Transmit and Receive Counters
373 AT91F_PDC_Open((AT91PS_PDC) &(pUSART->US_RPR));
375 //* Define the USART mode
376 pUSART->US_MR = mode ;
380 //*----------------------------------------------------------------------------
381 //* \fn AT91F_US_Close
382 //* \brief Close USART: disable IT disable receiver and transmitter, close PDC
383 //*----------------------------------------------------------------------------
384 void AT91F_US_Close(AT91PS_USART pUSART) // \arg pointer to a USART controller
386 //* Reset the baud rate divisor register
387 pUSART->US_BRGR = 0 ;
389 //* Reset the USART mode
392 //* Reset the Timeguard Register
395 //* Disable all interrupts
396 pUSART->US_IDR = 0xFFFFFFFF ;
398 //* Abort the Peripheral Data Transfers
399 AT91F_PDC_Close((AT91PS_PDC) &(pUSART->US_RPR));
401 //* Disable receiver and transmitter and stop any activity immediately
402 pUSART->US_CR = AT91C_US_TXDIS | AT91C_US_RXDIS | AT91C_US_RSTTX | AT91C_US_RSTRX ;