From: iceman1001 <iceman@iuse.se>
Date: Wed, 19 Oct 2016 22:40:24 +0000 (+0200)
Subject: CHG:  the AT91C_BASE_PMC->PMC_PCER has a tendecy to be clear when set with "=", ... 
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/f0a96745d0b97f74c0260cf362e226d0a62192b0

CHG:  the AT91C_BASE_PMC->PMC_PCER has a tendecy to be clear when set with "=",  but my tickstimer also needs it,  so I made it optional now.
---

diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c
index 08a38663..a1011ab7 100644
--- a/armsrc/fpgaloader.c
+++ b/armsrc/fpgaloader.c
@@ -117,7 +117,7 @@ void SetupSpi(int mode)
 // Set up the synchronous serial port, with the one set of options that we
 // always use when we are talking to the FPGA. Both RX and TX are enabled.
 //-----------------------------------------------------------------------------
-void FpgaSetupSsc(void) {
+void FpgaSetupSscExt(uint8_t clearPCER) {
 	// First configure the GPIOs, and get ourselves a clock.
 	AT91C_BASE_PIOA->PIO_ASR =
 		GPIO_SSC_FRAME	|
@@ -126,7 +126,10 @@ void FpgaSetupSsc(void) {
 		GPIO_SSC_CLK;
 	AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT;
 
-	AT91C_BASE_PMC->PMC_PCER |= (1 << AT91C_ID_SSC);
+	if ( clearPCER )
+		AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_SSC);
+	else
+		AT91C_BASE_PMC->PMC_PCER |= (1 << AT91C_ID_SSC);
 
 	// Now set up the SSC proper, starting from a known state.
 	AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
@@ -148,7 +151,9 @@ void FpgaSetupSsc(void) {
 
 	AT91C_BASE_SSC->SSC_CR = AT91C_SSC_RXEN | AT91C_SSC_TXEN;
 }
-
+void FpgaSetupSsc(void) {
+	FpgaSetupSscExt(TRUE);
+}
 //-----------------------------------------------------------------------------
 // Set up DMA to receive samples from the FPGA. We will use the PDC, with
 // a single buffer as a circular buffer (so that we just chain back to
diff --git a/armsrc/fpgaloader.h b/armsrc/fpgaloader.h
index 5e5e6af6..49290dc0 100644
--- a/armsrc/fpgaloader.h
+++ b/armsrc/fpgaloader.h
@@ -14,6 +14,7 @@ void FpgaSendCommand(uint16_t cmd, uint16_t v);
 void FpgaWriteConfWord(uint8_t v);
 void FpgaDownloadAndGo(int bitstream_version);
 void FpgaGatherVersion(int bitstream_version, char *dst, int len);
+void FpgaSetupSscExt(uint8_t clearPCER);
 void FpgaSetupSsc(void);
 void SetupSpi(int mode);
 bool FpgaSetupSscDma(uint8_t *buf, int len);
@@ -28,7 +29,6 @@ void SetAdcMuxFor(uint32_t whichGpio);
 #define FPGA_BITSTREAM_LF 1
 #define FPGA_BITSTREAM_HF 2
 
-
 // Definitions for the FPGA commands.
 #define FPGA_CMD_SET_CONFREG						(1<<12)
 #define FPGA_CMD_SET_DIVISOR						(2<<12)