📄 spi.lst
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\ ??SPI_EnableIt_0:
\ 0000000C 1480FCFF DC32 0xfffc8014
132
133 //*----------------------------------------------------------------------------
134 //* \fn AT91F_SPI_DisableIt
135 //* \brief Disable SPI interrupt
136 //*----------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
137 void SPI_DisableIt (unsigned int flag) // IT to be disabled
138 {
139 //* Write to the IDR register
140 AT91C_BASE_SPI0->SPI_IDR = flag;
\ SPI_DisableIt:
\ 00000000 ........ LDR R1,??DataTable2 ;; 0xfffc8018
\ 00000004 000081E5 STR R0,[R1, #+0]
141 }
\ 00000008 1EFF2FE1 BX LR ;; return
142
143
144 //------------------------------------------------------------------------------
145 /// Sends data through a SPI peripheral. If the SPI is configured to use a fixed
146 /// peripheral select, the npcs value is meaningless. Otherwise, it identifies
147 /// the component which shall be addressed.
148 /// \param spi Pointer to an AT91S_SPI instance.
149 /// \param npcs Chip select of the component to address (0, 1, 2 or 3).
150 /// \param data Word of data to send.
151 //------------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
152 void SPI_Write(AT91S_SPI *spi, unsigned int npcs, unsigned short data)
153 {
\ SPI_Write:
\ 00000000 00502DE9 PUSH {R12,LR}
154 char NPCS[4] = {0x0E,0x0D,0xB0,0x07};
\ 00000004 0D30B0E1 MOVS R3,SP
\ 00000008 3CC09FE5 LDR R12,??SPI_Write_0 ;; `?<Constant {14, 13, 176, 7}>`
\ 0000000C 00E09CE5 LDR LR,[R12, #0]
\ 00000010 00E083E5 STR LR,[R3, #+0]
155 // Discard contents of RDR register
156 //volatile unsigned int discard = spi->SPI_RDR;
157
158 // Send data
159 while ((spi->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
\ ??SPI_Write_1:
\ 00000014 103090E5 LDR R3,[R0, #+16]
\ 00000018 800F13E3 TST R3,#0x200
\ 0000001C FCFFFF0A BEQ ??SPI_Write_1
160 spi->SPI_TDR = data | (NPCS[npcs]<<16);
\ 00000020 0230B0E1 MOVS R3,R2
\ 00000024 0338A0E1 MOV R3,R3, LSL #+16
\ 00000028 2338B0E1 MOVS R3,R3, LSR #+16
\ 0000002C 0DC0B0E1 MOVS R12,SP
\ 00000030 0CC0D1E7 LDRB R12,[R1, +R12]
\ 00000034 0C3893E1 ORRS R3,R3,R12, LSL #+16
\ 00000038 0C3080E5 STR R3,[R0, #+12]
161 while ((spi->SPI_SR & AT91C_SPI_TDRE) == 0);
\ ??SPI_Write_2:
\ 0000003C 103090E5 LDR R3,[R0, #+16]
\ 00000040 020013E3 TST R3,#0x2
\ 00000044 FCFFFF0A BEQ ??SPI_Write_2
162 }
\ 00000048 0180BDE8 POP {R0,PC} ;; return
\ ??SPI_Write_0:
\ 0000004C ........ DC32 `?<Constant {14, 13, 176, 7}>`
163
164 //------------------------------------------------------------------------------
165 /// Sends the contents of buffer through a SPI peripheral, using the PDC to
166 /// take care of the transfer.
167 /// \param spi Pointer to an AT91S_SPI instance.
168 /// \param buffer Data buffer to send.
169 /// \param length Length of the data buffer.
170 //------------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
171 unsigned char SPI_WriteBuffer(AT91S_SPI *spi,
172 void *buffer,
173 unsigned int length)
174 {
\ SPI_WriteBuffer:
\ 00000000 0030B0E1 MOVS R3,R0
175 // Check if first bank is free
176 if (spi->SPI_TCR == 0)
\ 00000004 0C0193E5 LDR R0,[R3, #+268]
\ 00000008 000050E3 CMP R0,#+0
\ 0000000C 0500001A BNE ??SPI_WriteBuffer_0
177 {
178 spi->SPI_TPR = (unsigned int) buffer;
\ 00000010 081183E5 STR R1,[R3, #+264]
179 spi->SPI_TCR = length;
\ 00000014 0C2183E5 STR R2,[R3, #+268]
180 spi->SPI_PTCR = AT91C_PDC_TXTEN;
\ 00000018 400FA0E3 MOV R0,#+256
\ 0000001C 200183E5 STR R0,[R3, #+288]
181 return 1;
\ 00000020 0100A0E3 MOV R0,#+1
\ 00000024 070000EA B ??SPI_WriteBuffer_1
182 }
183 // Check if second bank is free
184 else if (spi->SPI_TNCR == 0)
\ ??SPI_WriteBuffer_0:
\ 00000028 1C0193E5 LDR R0,[R3, #+284]
\ 0000002C 000050E3 CMP R0,#+0
\ 00000030 0300001A BNE ??SPI_WriteBuffer_2
185 {
186 spi->SPI_TNPR = (unsigned int) buffer;
\ 00000034 181183E5 STR R1,[R3, #+280]
187 spi->SPI_TNCR = length;
\ 00000038 1C2183E5 STR R2,[R3, #+284]
188 return 1;
\ 0000003C 0100A0E3 MOV R0,#+1
\ 00000040 000000EA B ??SPI_WriteBuffer_1
189 }
190 // No free banks
191 return 0;
\ ??SPI_WriteBuffer_2:
\ 00000044 0000A0E3 MOV R0,#+0
\ ??SPI_WriteBuffer_1:
\ 00000048 1EFF2FE1 BX LR ;; return
192 }
193
194 //------------------------------------------------------------------------------
195 /// Returns 1 if there is no pending write operation on the SPI; otherwise
196 /// returns 0.
197 /// \param pSpi Pointer to an AT91S_SPI instance.
198 //------------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
199 unsigned char SPI_IsFinished(AT91S_SPI *pSpi)
200 {
201 return ((pSpi->SPI_SR & AT91C_SPI_TXEMPTY) != 0);
\ SPI_IsFinished:
\ 00000000 100090E5 LDR R0,[R0, #+16]
\ 00000004 800F10E3 TST R0,#0x200
\ 00000008 0100000A BEQ ??SPI_IsFinished_0
\ 0000000C 0100A0E3 MOV R0,#+1
\ 00000010 000000EA B ??SPI_IsFinished_1
\ ??SPI_IsFinished_0:
\ 00000014 0000A0E3 MOV R0,#+0
\ ??SPI_IsFinished_1:
\ 00000018 FF0010E2 ANDS R0,R0,#0xFF ;; Zero extend
\ 0000001C 1EFF2FE1 BX LR ;; return
202 }
203
204 //------------------------------------------------------------------------------
205 /// Reads and returns the last word of data received by a SPI peripheral. This
206 /// method must be called after a successful SPI_Write call.
207 /// \param spi Pointer to an AT91S_SPI instance.
208 //------------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
209 unsigned short SPI_Read(AT91S_SPI *spi)
210 {
211 while ((spi->SPI_SR & AT91C_SPI_RDRF) == 0);
\ SPI_Read:
\ ??SPI_Read_0:
\ 00000000 101090E5 LDR R1,[R0, #+16]
\ 00000004 010011E3 TST R1,#0x1
\ 00000008 FCFFFF0A BEQ ??SPI_Read_0
212 return spi->SPI_RDR & 0xFFFF;
\ 0000000C 080090E5 LDR R0,[R0, #+8]
\ 00000010 0008A0E1 MOV R0,R0, LSL #+16
\ 00000014 2008B0E1 MOVS R0,R0, LSR #+16
\ 00000018 1EFF2FE1 BX LR ;; return
213 }
214
215 //------------------------------------------------------------------------------
216 /// Reads data from a SPI peripheral until the provided buffer is filled. This
217 /// method does NOT need to be called after SPI_Write or SPI_WriteBuffer.
218 /// \param spi Pointer to an AT91S_SPI instance.
219 /// \param buffer Data buffer to store incoming bytes.
220 /// \param length Length in bytes of the data buffer.
221 //------------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
222 unsigned char SPI_ReadBuffer(AT91S_SPI *spi,
223 void *buffer,
224 unsigned int length)
225 {
\ SPI_ReadBuffer:
\ 00000000 0030B0E1 MOVS R3,R0
226 // Check if the first bank is free
227 if (spi->SPI_RCR == 0)
\ 00000004 040193E5 LDR R0,[R3, #+260]
\ 00000008 000050E3 CMP R0,#+0
\ 0000000C 0500001A BNE ??SPI_ReadBuffer_0
228 {
229 spi->SPI_RPR = (unsigned int) buffer;
\ 00000010 001183E5 STR R1,[R3, #+256]
230 spi->SPI_RCR = length;
\ 00000014 042183E5 STR R2,[R3, #+260]
231 spi->SPI_PTCR = AT91C_PDC_RXTEN;
\ 00000018 0100A0E3 MOV R0,#+1
\ 0000001C 200183E5 STR R0,[R3, #+288]
232 return 1;
\ 00000020 0100A0E3 MOV R0,#+1
\ 00000024 070000EA B ??SPI_ReadBuffer_1
233 }
234 // Check if second bank is free
235 else if (spi->SPI_RNCR == 0)
\ ??SPI_ReadBuffer_0:
\ 00000028 140193E5 LDR R0,[R3, #+276]
\ 0000002C 000050E3 CMP R0,#+0
\ 00000030 0300001A BNE ??SPI_ReadBuffer_2
236 {
237 spi->SPI_RNPR = (unsigned int) buffer;
\ 00000034 101183E5 STR R1,[R3, #+272]
238 spi->SPI_RNCR = length;
\ 00000038 142183E5 STR R2,[R3, #+276]
239 return 1;
\ 0000003C 0100A0E3 MOV R0,#+1
\ 00000040 000000EA B ??SPI_ReadBuffer_1
240 }
241 // No free bank
242 return 0;
\ ??SPI_ReadBuffer_2:
\ 00000044 0000A0E3 MOV R0,#+0
\ ??SPI_ReadBuffer_1:
\ 00000048 1EFF2FE1 BX LR ;; return
243 }
244
245
246 //*****************************************************************************
247 //* 函数名称：AT91F_DataFlashHandler
248 //* 函数功能：SPI0 中断处理程序
249 //* 入口参数：status: SPI0 中断状态
250 //* 返回值 ：无
251 //*****************************************************************************
\ In section .text, align 4, keep-with-next
252 void SPI0_Handler(unsigned int status)
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