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author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2007-10-30 10:46:57 +0000 |
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committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2007-10-30 10:46:57 +0000 |
commit | 35dea10cc76722976bfbf368dd50f7617ca86a45 (patch) | |
tree | c900ffd7fbee5e95c02c1e20c023873c26f877f7 /ports/ARM7-LPC214x/GCC | |
parent | 5eeed3ddb57efd621240097b87129c49ed6185a6 (diff) | |
download | ChibiOS-35dea10cc76722976bfbf368dd50f7617ca86a45.tar.gz ChibiOS-35dea10cc76722976bfbf368dd50f7617ca86a45.tar.bz2 ChibiOS-35dea10cc76722976bfbf368dd50f7617ca86a45.zip |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@69 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'ports/ARM7-LPC214x/GCC')
-rw-r--r-- | ports/ARM7-LPC214x/GCC/lpc214x.h | 75 | ||||
-rw-r--r-- | ports/ARM7-LPC214x/GCC/lpc214x_ssp.c | 78 | ||||
-rw-r--r-- | ports/ARM7-LPC214x/GCC/lpc214x_ssp.h | 32 |
3 files changed, 185 insertions, 0 deletions
diff --git a/ports/ARM7-LPC214x/GCC/lpc214x.h b/ports/ARM7-LPC214x/GCC/lpc214x.h index 74bbce2c3..213409cb9 100644 --- a/ports/ARM7-LPC214x/GCC/lpc214x.h +++ b/ports/ARM7-LPC214x/GCC/lpc214x.h @@ -338,6 +338,81 @@ typedef struct { #define TER_ENABLE 0x80
/*
+ * SSP.
+ */
+typedef struct {
+ IOREG32 SSP_CR0;
+ IOREG32 SSP_CR1;
+ IOREG32 SSP_DR;
+ IOREG32 SSP_SR;
+ IOREG32 SSP_CPSR;
+ IOREG32 SSP_IMSC;
+ IOREG32 SSP_RIS;
+ IOREG32 SSP_MIS;
+ IOREG32 SSP_ICR;
+} SSP;
+
+#define SSPBase ((SSP *)0xE0068000)
+#define SSPCR0 (SSPBase->SSP_CR0)
+#define SSPCR1 (SSPBase->SSP_CR1)
+#define SSPDR (SSPBase->SSP_DR)
+#define SSPSR (SSPBase->SSP_SR)
+#define SSPCPSR (SSPBase->SSP_CPSR)
+#define SSPIMSC (SSPBase->SSP_IMSC)
+#define SSPRIS (SSPBase->SSP_RIS)
+#define SSPMIS (SSPBase->SSP_MIS)
+#define SSPICR (SSPBase->SSP_ICR)
+
+#define CR0_DSS4BIT 3
+#define CR0_DSS5BIT 4
+#define CR0_DSS6BIT 5
+#define CR0_DSS7BIT 6
+#define CR0_DSS8BIT 7
+#define CR0_DSS9BIT 8
+#define CR0_DSS10BIT 9
+#define CR0_DSS11BIT 0xA
+#define CR0_DSS12BIT 0xB
+#define CR0_DSS13BIT 0xC
+#define CR0_DSS14BIT 0xD
+#define CR0_DSS15BIT 0xE
+#define CR0_DSS16BIT 0xF
+#define CR0_FRFSPI 0
+#define CR0_FRFSSI 0x10
+#define CR0_FRFMW 0x20
+#define CR0_CPOL 0x40
+#define CR0_CPHA 0x80
+#define CR0_CLOCKRATE(n) ((n) << 8)
+
+#define CR1_LBM 1
+#define CR1_SSE 2
+#define CR1_MS 4
+#define CR1_SOD 8
+
+#define SR_TFE 1
+#define SR_TNF 2
+#define SR_RNE 4
+#define SR_RFF 8
+#define SR_BSY 0x10
+
+#define IMSC_ROR 1
+#define IMSC_RT 2
+#define IMSC_RX 4
+#define IMSC_TX 8
+
+#define RIS_ROR 1
+#define RIS_RT 2
+#define RIS_RX 4
+#define RIS_TX 8
+
+#define MIS_ROR 1
+#define MIS_RT 2
+#define MIS_RX 4
+#define MIS_TX 8
+
+#define ICR_ROR 1
+#define ICR_RT 2
+
+/*
* Timers/Counters.
*/
typedef struct {
diff --git a/ports/ARM7-LPC214x/GCC/lpc214x_ssp.c b/ports/ARM7-LPC214x/GCC/lpc214x_ssp.c new file mode 100644 index 000000000..4168b6157 --- /dev/null +++ b/ports/ARM7-LPC214x/GCC/lpc214x_ssp.c @@ -0,0 +1,78 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <ch.h>
+
+#include "lpc214x.h"
+#include "lpc214x_ssp.h"
+
+static BYTE8 *ip, *op;
+static t_size icnt, ocnt;
+static t_sspnotify callback;
+
+void SSPIrq(void) {
+}
+
+/*
+ * Starts an asynchronous SSP transfer.
+ * @param in pointer to the incoming data buffer, if this parameter is set to
+ * \p NULL then the incoming data is discarded.
+ * @param out pointer to the outgoing data buffer, if this parameter is set to
+ * \p NULL then 0xFF bytes will be output.
+ * @param n the number of bytes to be transferred
+ * @param fn callback function invoked when the operation is done
+ * @return \p SSP_OK if the trasfer is started else \p SSP_RUNNING if a
+ * an operation was already started
+ */
+t_msg sspRWI(BYTE8 *in, BYTE8 *out, t_size n, t_sspnotify fn) {
+
+ if (callback)
+ return SSP_RUNNING;
+
+ callback = fn, ip = in, op = out, icnt = ocnt = n;
+ SSPIMSC = IMSC_ROR | IMSC_RT | IMSC_RX | IMSC_TX;
+ return SSP_OK;
+}
+
+/*
+ * SSP setup, must be invoked with interrupts disabled.
+ * Do not invoke while an operation is in progress.
+ */
+void SetSSPI(int cpsr, int cr0, int cr1) {
+ SSP *ssp = SSPBase;
+
+ ssp->SSP_CR1 = cr1 & ~CR1_SSE;
+ ssp->SSP_CR0 = cr0;
+ ssp->SSP_CPSR = cpsr;
+ ssp->SSP_CR1 = cr1 | CR1_SSE;
+}
+
+/*
+ * SSP subsystem initialization.
+ */
+void InitSSP(void) {
+
+ /* Enables the SPI1 clock */
+ PCONP = (PCONP & PCALL) | PCSPI1;
+
+ /* Clock = PCLK / 2 */
+ SetSSPI(2, CR0_DSS8BIT | CR0_FRFSPI | CR0_CLOCKRATE(0), 0);
+
+ VICIntEnable = INTMASK(SOURCE_SPI1);
+}
diff --git a/ports/ARM7-LPC214x/GCC/lpc214x_ssp.h b/ports/ARM7-LPC214x/GCC/lpc214x_ssp.h new file mode 100644 index 000000000..655a6b1e0 --- /dev/null +++ b/ports/ARM7-LPC214x/GCC/lpc214x_ssp.h @@ -0,0 +1,32 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _LPC214x_SSP_H_
+#define _LPC214x_SSP_H_
+
+#define SSP_OK RDY_OK
+#define SSP_RUNNING -3
+
+typedef void (*t_sspnotify)(void);
+
+void InitSSP(void);
+void SetSSPI(int cpsr, int cr0, int cr1);
+void SSPIrqHandler(void);
+
+#endif /* _LPC214x_SSP_H_*/
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