Merge pull request #3 from jscrane/esp32-target

Esp32 target

hardware.h

@@ -6,35 +6,23 @@
 #define __HARDWARE_H__
 
 // TFT display...
-// NOTE: edit memorysaver.h to select the correct chip for your display!
-// Daniel Rebollo's boosterpack
-#define TFT_BACKLIGHT	PD_6
-#define TFT_MODEL	SSD1289
-// TFT01_2.4: http://www.elecfreaks.com/store/24-tft-lcd-tft0124-p-110.html
-// #undef TFT_BACKLIGHT
-// #define TFT_MODEL	S6D1121_8
-#define TFT_RS		PC_6
-#define TFT_WR		PC_5
-#define TFT_CS		PC_7
-#define TFT_RST		PC_4
+#undef TFT_BACKLIGHT
+#define TFT_MODEL	ILI9325C
+#define TFT_RS		32
+#define TFT_WR		33
+#define TFT_CS		27
+#define TFT_RST		26
 
 // PS/2 keyboard
-#define KBD_DATA	PE_4
-#define KBD_IRQ		PE_5
+#define KBD_DATA	14
+#define KBD_IRQ		12
 
 // SPI-RAM
-#define SPIRAM_CS       PE_0
-//#define SPIRAM_CS       PF_3
-#define SPIRAM_SPI      1
-#define SPIRAM_DEV      SPI_for_SD
-#define SPIRAM_SIZE	65536
+#undef SPIRAM_CS
 
 // "tape" storage...
-#define SD_CS		PF_3
-//#define SD_CS		PE_0
-#define SD_SPI		1
-
-#define SPI_CS		PF_3
+#undef SD_CS
+#define USE_SPIFFS	1
 
 bool hardware_reset();
 void hardware_init(class CPU &);

r6502.h

@@ -2,6 +2,8 @@
 #define __R6502_H__
 
 #undef PC
+#undef cli
+#undef sei
 class Stream;
 
 class r6502: public CPU {

r65emu.h

@@ -13,5 +13,6 @@
 #include "timed.h"
 #include "hardware.h"
 #include "checkpoint.h"
+#include "sound.h"
 
 #endif

sound.cpp

@@ -0,0 +1,67 @@
+#include <Arduino.h>
+#include <hardware.h>
+#include "timed.h"
+#include "sound.h"
+
+#if defined(DAC_SOUND) && defined(ESP_PLATFORM)
+#include <driver/dac.h>
+
+static portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED;
+
+static dac_channel_t channel;
+
+static volatile const uint8_t *_bytes;
+static volatile unsigned _size, _off;
+static hw_timer_t *timer;
+
+void IRAM_ATTR timer_callback() {
+	portENTER_CRITICAL_ISR(&mux);
+
+	if (_off < _size)
+		dac_output_voltage(channel, _bytes[_off++]);
+	else {
+		_bytes = 0;
+		dac_output_disable(channel);
+		timerAlarmDisable(timer);
+	}
+
+	portEXIT_CRITICAL_ISR(&mux);
+}
+
+void Sound::begin(unsigned pin, unsigned freq) {
+	if (pin == 25)
+		channel = DAC_CHANNEL_1;
+	else if (pin == 26)
+		channel = DAC_CHANNEL_2;
+
+	timer = timerBegin(1, 80, true);
+	timerAttachInterrupt(timer, &timer_callback, true);
+	timerAlarmWrite(timer, 1000000 / freq, true);
+}
+
+const uint8_t *Sound::play(const uint8_t *bytes, unsigned size) {
+	portENTER_CRITICAL_ISR(&mux);
+
+	const uint8_t *play = (const uint8_t *)_bytes;
+	if (_off == _size) {
+		_bytes = bytes;
+		_size = size;
+		_off = 0;
+		dac_output_enable(channel);
+		timerAlarmEnable(timer);
+		play = bytes;
+	}
+
+	portEXIT_CRITICAL_ISR(&mux);
+	return play;
+}
+
+#else
+// does nothing by default
+void Sound::begin(unsigned channel, unsigned freq) {
+}
+
+const uint8_t *Sound::play(const uint8_t *bytes, unsigned size) {
+	return 0;
+}
+#endif

sound.h

@@ -0,0 +1,10 @@
+#ifndef __SOUND_H__
+#define __SOUND_H__
+
+class Sound {
+public:
+	void begin(unsigned pin, unsigned freq);
+	const uint8_t *play(const uint8_t *bytes, unsigned size);
+};
+
+#endif

timed.cpp

@@ -1,5 +1,4 @@
 #include <Arduino.h>
-#include <stdint.h>
 
 #if defined(__LM4F120H5QR__)
 #include <inc/hw_ints.h>
@@ -29,4 +28,16 @@ void timer_create(unsigned freq, Timed *client) {
 	ROM_TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
 	ROM_TimerLoadSet(TIMER0_BASE, TIMER_A, ROM_SysCtlClockGet() / freq);
 }
+#elif defined(ESP_PLATFORM)
+
+void IRAM_ATTR onTimer() {
+	t->tick();
+}
+
+void timer_create(unsigned freq, Timed *client) {
+	hw_timer_t *timer = timerBegin(3, 80, true);	// prescaler of 80
+	timerAttachInterrupt(timer, &onTimer, true);
+	timerAlarmWrite(timer, 1000000 / freq, true);
+	timerAlarmEnable(timer);
+}
 #endif