implemented FSMC for driving an LCD on 16 bit parallel data bus

stevstrong · stevstrong · commit f7a444b9ef0a · 2017-05-21T11:01:22.000+02:00
diff --git a/STM32F4/cores/maple/libmaple/fsmc.c b/STM32F4/cores/maple/libmaple/fsmc.c
@@ -35,62 +35,53 @@
 #ifdef STM32_HIGH_DENSITY
 
 /**
- * Configure FSMC GPIOs for use with SRAM.
- */
-void fsmc_sram_init_gpios(void) {
-    /* Data lines... */
-    gpio_set_mode(PD0, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD1, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD8, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD9, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD10, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD14, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD15, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE7, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE8, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE9, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE10, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE11, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE12, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE13, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE14, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PE15, GPIO_AF_OUTPUT_PP);
+ * Configure FSMC GPIOs for use with LCDs.
+ */ 
 
-    /* Address lines... */
-    gpio_set_mode(PD11, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD12, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(PD13, GPIO_AF_OUTPUT_PP);
-#if 0 // not available on LQFP package
-    gpio_set_mode(GPIOF,  0, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF,  1, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF,  2, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF,  3, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF,  4, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF,  5, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF, 12, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF, 13, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF, 14, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOF, 15, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOG,  0, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOG,  1, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOG,  2, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOG,  3, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOG,  4, GPIO_AF_OUTPUT_PP);
-    gpio_set_mode(GPIOG,  5, GPIO_AF_OUTPUT_PP);
-#endif  // not available on LQFP package
-    /* And control lines... */
-    gpio_set_mode(PD4, GPIO_AF_OUTPUT_PP);   // NOE
-    gpio_set_mode(PD5, GPIO_AF_OUTPUT_PP);   // NWE
+void fsmc_init(void) {
+    rcc_clk_enable(RCC_FSMC);
+    rcc_reset_dev(RCC_FSMC);
+}
 
-    gpio_set_mode(PD7, GPIO_AF_OUTPUT_PP);   // NE1
-#if 0 // not available on LQFP package
-    gpio_set_mode(GPIOG,  9, GPIO_AF_OUTPUT_PP);   // NE2
-    gpio_set_mode(GPIOG, 10, GPIO_AF_OUTPUT_PP);   // NE3
-    gpio_set_mode(GPIOG, 12, GPIO_AF_OUTPUT_PP);   // NE4
-#endif  // not available on LQFP package
+// used control, address and data lines
+// NOE -> RD, NWE -> WR, A18 -> RS, NE1 -> CS
+const uint8_t fsmc_pins[]= {FSMC_NOE, FSMC_NWE, FSMC_NE1, FSMC_A18,
+							FSMC_D0, FSMC_D1, FSMC_D2, FSMC_D3,
+							FSMC_D4, FSMC_D5, FSMC_D6, FSMC_D7,
+							FSMC_D8, FSMC_D9, FSMC_D10, FSMC_D11,
+							FSMC_D12, FSMC_D13, FSMC_D14, FSMC_D15};
 
-    gpio_set_mode(PE0, GPIO_AF_OUTPUT_PP);   // NBL0
-    gpio_set_mode(PE1, GPIO_AF_OUTPUT_PP);   // NBL1
+void fsmc_lcd_init_gpios(void) {
+	uint8_t i;
+	for (i=0; i<sizeof(fsmc_pins); i++) {
+		uint8_t pin = fsmc_pins[i];
+		gpio_set_mode(pin, GPIO_AF_OUTPUT_PP);
+		gpio_set_af_mode(pin, 12);
+	}
 }
 
+volatile uint16_t * fsmcCommand;
+volatile uint16_t * fsmcData;
+
+void fsmc_lcd_init(void)
+{
+    fsmcCommand    =  FSMC_BANK1; // clears A18
+    fsmcData       =  (fsmcCommand+(1<<18)); // sets A18
+
+	fsmc_init();
+	fsmc_lcd_init_gpios();
+	// set access for asynchronous SRAM type, 16 bit wide data bus
+	// see RM0090, 36.5.4, pages 1552-1554
+	uint32_t val = (FSMC_BCR_MTYP_SRAM | FSMC_BCR_MWID_16BITS | FSMC_BCR_WREN);
+	//Serial.print("BCR: "); Serial.println(val, HEX);
+	fsmc_nor_psram_set_BCR(FSMC_NOR_PSRAM1_BASE, val);
+	// set timing data Mode 1. Adjust DATAST according to the WR low period timing from the LCD specification
+	val = (FSMC_BTR_ACCMOD_A | FSMC_BTR_DATLAT_(0) | FSMC_BTR_CLKDIV_(0) | FSMC_BTR_BUSTURN_(0) | FSMC_BTR_DATAST_(6) | FSMC_BTR_ADDHLD_(0) | FSMC_BTR_ADDSET_(2));
+	//Serial.print("BTR: "); Serial.println(val, HEX);
+	fsmc_nor_psram_set_BTR(FSMC_NOR_PSRAM1_BASE, val);
+	// enable FSCM
+	fsmc_nor_psram_bank_enable(FSMC_NOR_PSRAM1_BASE);
+}
+
+
 #endif  /* STM32_HIGH_DENSITY */
diff --git a/STM32F4/cores/maple/libmaple/fsmc.h b/STM32F4/cores/maple/libmaple/fsmc.h
@@ -33,15 +33,16 @@
  * See ../notes/fsmc.txt for more info
  */
 
-#include "libmaple_types.h"
-
 /**
  * @file fsmc.h
  */
 
 #ifndef _FSMC_H_
 #define _FSMC_H_
 
+#include <libmaple\util.h>
+#include "libmaple_types.h"
+
 #ifdef __cplusplus
 extern "C"{
 #endif
@@ -62,27 +63,27 @@ typedef struct fsmc_reg_map {
     __io uint32 BTR3; /**< SRAM/NOR-Flash chip-select timing register 3 */
     __io uint32 BCR4; /**< SRAM/NOR-Flash chip-select control register 4 */
     __io uint32 BTR4; /**< SRAM/NOR-Flash chip-select timing register 4 */
-    const uint8 RESERVED1[64];  /**< Reserved */
+    const uint32 RESERVED1[16];  /**< Reserved */
     __io uint32 PCR2;  /**< PC Card/NAND Flash control register 2 */
     __io uint32 SR2;   /**< FIFO status and interrupt register 2 */
     __io uint32 PMEM2; /**< Common memory space timing register 2 */
     __io uint32 PATT2; /**< Attribute memory space timing register 2 */
-    const uint8 RESERVED2[4];   /**< Reserved */
+    const uint32 RESERVED2;   /**< Reserved */
     __io uint32 ECCR2; /**< ECC result register 2 */
-    const uint8 RESERVED3[2];
+    const uint32 RESERVED3[2];   /**< Reserved */
     __io uint32 PCR3;  /**< PC Card/NAND Flash control register 3 */
     __io uint32 SR3;   /**< FIFO status and interrupt register 3 */
     __io uint32 PMEM3; /**< Common memory space timing register 3 */
     __io uint32 PATT3; /**< Attribute memory space timing register 3 */
     const uint32 RESERVED4;     /**< Reserved */
     __io uint32 ECCR3; /**< ECC result register 3 */
-    const uint8 RESERVED5[8];   /**< Reserved */
+    const uint32 RESERVED5[2];   /**< Reserved */
     __io uint32 PCR4;  /**< PC Card/NAND Flash control register 4 */
     __io uint32 SR4;   /**< FIFO status and interrupt register 4 */
     __io uint32 PMEM4; /**< Common memory space timing register 4 */
     __io uint32 PATT4; /**< Attribute memory space timing register 4 */
     __io uint32 PIO4;  /**< I/O space timing register 4 */
-    const uint8 RESERVED6[80];  /**< Reserved */
+    const uint32 RESERVED6[20];  /**< Reserved */
     __io uint32 BWTR1; /**< SRAM/NOR-Flash write timing register 1 */
     const uint32 RESERVED7;     /**< Reserved */
     __io uint32 BWTR2; /**< SRAM/NOR-Flash write timing register 2 */
@@ -101,7 +102,7 @@ typedef struct fsmc_reg_map {
 typedef struct fsmc_nor_psram_reg_map {
     __io uint32 BCR;            /**< Chip-select control register */
     __io uint32 BTR;            /**< Chip-select timing register */
-    const uint8 RESERVED[252];  /**< Reserved */
+    const uint32 RESERVED[64];  /**< Reserved */
     __io uint32 BWTR;           /**< Write timing register */
 } fsmc_nor_psram_reg_map;
 
@@ -170,6 +171,13 @@ typedef struct fsmc_nor_psram_reg_map {
 #define FSMC_BTR_ADDHLD                 (0xF << 4)
 #define FSMC_BTR_ADDSET                 0xF
 
+#define FSMC_BTR_DATLAT_(x)		((x<<24)&FSMC_BTR_DATLAT)
+#define FSMC_BTR_CLKDIV_(x)		((x<<20)&FSMC_BTR_CLKDIV)
+#define FSMC_BTR_BUSTURN_(x)	((x<<16)&FSMC_BTR_BUSTURN)
+#define FSMC_BTR_DATAST_(x)		((x<<8)&FSMC_BTR_DATAST)
+#define FSMC_BTR_ADDHLD_(x)		((x<<4)&FSMC_BTR_ADDHLD)
+#define FSMC_BTR_ADDSET_(x)		((x<<0)&FSMC_BTR_ADDSET)
+
 /* SRAM/NOR-Flash write timing registers */
 
 #define FSMC_BWTR_ACCMOD                 (0x3 << 28)
@@ -280,8 +288,26 @@ typedef struct fsmc_nor_psram_reg_map {
 /*
  * SRAM/NOR Flash routines
  */
+extern volatile uint16_t * fsmcData;
+extern volatile uint16_t * fsmcCommand;
+
+void fsmc_lcd_init(void);
 
-void fsmc_sram_init_gpios(void);
+static inline void fsmc_nor_psram_set_BCR(fsmc_nor_psram_reg_map *regs, uint32_t bcr) {
+    regs->BCR = bcr;
+}
+
+static inline void fsmc_nor_psram_set_BTR(fsmc_nor_psram_reg_map *regs, uint32_t btr) {
+    regs->BTR = btr;
+}
+
+static inline void fsmc_nor_psram_bank_enable(fsmc_nor_psram_reg_map *regs) {
+    regs->BCR |= FSMC_BCR_MBKEN;
+}
+
+static inline void fsmc_nor_psram_bank_disable(fsmc_nor_psram_reg_map *regs) {
+    regs->BCR ^= FSMC_BCR_MBKEN;
+}
 
 /**
  * Set the DATAST bits in the given NOR/PSRAM register map's
diff --git a/STM32F4/cores/maple/libmaple/gpio.h b/STM32F4/cores/maple/libmaple/gpio.h
@@ -69,22 +69,22 @@ static inline void gpio_write_pin(uint8_t pin, uint16 val) {
     }
 }
 
-static inline void gpio_set_pin(uint8_t pin) {
-	(PIN_MAP[pin].gpio_device)->regs->BSRRL = BIT(pin&0x0F);
-}
-
 static inline void gpio_set_dev_bit(const gpio_dev * dev, uint8_t bit) {
 	dev->regs->BSRRL = BIT(bit);
 }
 
-static inline void gpio_clear_pin(uint8_t pin) {
-	(PIN_MAP[pin].gpio_device)->regs->BSRRH = BIT(pin&0x0F);
-}
-
 static inline void gpio_clear_dev_bit(const gpio_dev * dev, uint8_t bit) {
 	dev->regs->BSRRH = BIT(bit);
 }
 
+static inline void gpio_set_pin(uint8_t pin) {
+	gpio_set_dev_bit(PIN_MAP[pin].gpio_device, (pin&0x0F));
+}
+
+static inline void gpio_clear_pin(uint8_t pin) {
+	gpio_clear_dev_bit(PIN_MAP[pin].gpio_device, (pin&0x0F));
+}
+
 /**
  * Determine whether or not a GPIO pin is set.
  *
diff --git a/STM32F4/cores/maple/wirish_digital.cpp b/STM32F4/cores/maple/wirish_digital.cpp
@@ -33,7 +33,7 @@
 
 void pinMode(uint8 pin, WiringPinMode mode) {
     gpio_pin_mode outputMode;
-    boolean pwm = false;
+//    boolean pwm = false;
 
     if (pin >= BOARD_NR_GPIO_PINS) {
         return;
@@ -61,11 +61,11 @@ void pinMode(uint8 pin, WiringPinMode mode) {
         break;
     case PWM:
         outputMode = GPIO_AF_OUTPUT_PP;
-        pwm = true;
+//        pwm = true;
         break;
     case PWM_OPEN_DRAIN:
         outputMode = GPIO_AF_OUTPUT_OD;
-        pwm = true;
+//        pwm = true;
         break;
     default:
         ASSERT(0);
diff --git a/STM32F4/variants/generic_f407v/generic_f407v.h b/STM32F4/variants/generic_f407v/generic_f407v.h
@@ -106,6 +106,35 @@
 #define BOARD_SDIO_CK           PC12 //Port2Pin('C',12)
 #define BOARD_SDIO_CMD          PD2  //Port2Pin('D', 2)
 
+#define FSMC_NOE			PD4
+#define FSMC_NWE			PD5
+#define FSMC_NE1			PD7
+#define FSMC_A18			PD13
+#define FSMC_A17			PD12
+#define FSMC_A16			PD11
+#define FSMC_D0				PD14
+#define FSMC_D1				PD15
+#define FSMC_D2				PD0
+#define FSMC_D3				PD1
+#define FSMC_D4				PE7
+#define FSMC_D5				PE8
+#define FSMC_D6				PE9
+#define FSMC_D7				PE10
+#define FSMC_D8				PE11
+#define FSMC_D9				PE12
+#define FSMC_D10			PE13
+#define FSMC_D11			PE14
+#define FSMC_D12			PE15
+#define FSMC_D13			PD8
+#define FSMC_D14			PD9
+#define FSMC_D15			PD10
+
+#define BOARD_T_CS			BOARD_SPI2_NSS_PIN
+#define BOARD_T_SCK			BOARD_SPI2_SCK_PIN
+#define BOARD_T_MISO		BOARD_SPI2_MISO_PIN
+#define BOARD_T_MOSI		BOARD_SPI2_MOSI_PIN
+#define BOARD_T_PEN			PC5
+
 #define BOARD_NR_GPIO_PINS      80
 #define BOARD_NR_PWM_PINS       22
 #define BOARD_NR_ADC_PINS       16

Original file line number	Diff line number	Diff line change
`@@ -69,22 +69,22 @@ static inline void gpio_write_pin(uint8_t pin, uint16 val) {`
`69`	`69`	`}`
`70`	`70`	`}`
`71`	`71`
`72`		`-static inline void gpio_set_pin(uint8_t pin) {`
`73`		`- (PIN_MAP[pin].gpio_device)->regs->BSRRL = BIT(pin&0x0F);`
`74`		`-}`
`75`		`-`
`76`	`72`	`static inline void gpio_set_dev_bit(const gpio_dev * dev, uint8_t bit) {`
`77`	`73`	`dev->regs->BSRRL = BIT(bit);`
`78`	`74`	`}`
`79`	`75`
`80`		`-static inline void gpio_clear_pin(uint8_t pin) {`
`81`		`- (PIN_MAP[pin].gpio_device)->regs->BSRRH = BIT(pin&0x0F);`
`82`		`-}`
`83`		`-`
`84`	`76`	`static inline void gpio_clear_dev_bit(const gpio_dev * dev, uint8_t bit) {`
`85`	`77`	`dev->regs->BSRRH = BIT(bit);`
`86`	`78`	`}`
`87`	`79`
	`80`	`+static inline void gpio_set_pin(uint8_t pin) {`
	`81`	`+ gpio_set_dev_bit(PIN_MAP[pin].gpio_device, (pin&0x0F));`
	`82`	`+}`
	`83`	`+`
	`84`	`+static inline void gpio_clear_pin(uint8_t pin) {`
	`85`	`+ gpio_clear_dev_bit(PIN_MAP[pin].gpio_device, (pin&0x0F));`
	`86`	`+}`
	`87`	`+`
`88`	`88`	`/**`
`89`	`89`	`* Determine whether or not a GPIO pin is set.`
`90`	`90`	`*`