Initial commit

7 files changed, 404 insertions, 0 deletions

diff --git a/include/fifo.h b/include/fifo.h
new file mode 100644
index 0000000..c6eee2d
--- /dev/null
+++ b/include/fifo.h
@@ -0,0 +1,45 @@
+#ifndef FIFO_H
+#define FIFO_H
+
+#include <zeta.h>
+
+#define FIFO_LEN 32
+
+struct fifo {
+    uint8_t head;
+    uint8_t tail;
+    uint8_t data[FIFO_LEN];
+};
+
+static inline uint8_t
+fifo_pop(struct fifo *fifo)
+{
+    uint8_t ret = fifo->data[fifo->head];
+    if (++fifo->head >= LENGTH(fifo->data))
+        fifo->head = 0;
+    return ret;
+}
+
+static inline void
+fifo_push(struct fifo *fifo, uint8_t v)
+{
+    fifo->data[fifo->tail] = v;
+
+    if (++fifo->tail >= LENGTH(fifo->data))
+        fifo->tail = 0;
+}
+
+static inline bool
+fifo_empty(const struct fifo *fifo)
+{
+    return (fifo->head == fifo->tail);
+}
+
+static inline void
+fifo_clear(struct fifo *fifo)
+{
+    fifo->head = 0;
+    fifo->tail = 0;
+}
+
+#endif // FIFO_H
diff --git a/include/hardware.h b/include/hardware.h
new file mode 100644
index 0000000..2e6c9da
--- /dev/null
+++ b/include/hardware.h
@@ -0,0 +1,80 @@
+#ifndef HARDWARE_H
+#define HARDWARE_H
+
+// ********************************************************
+#define CTC_CHANNEL_0 0x00
+#define CTC_CHANNEL_1 0x01
+#define CTC_CHANNEL_2 0x02
+#define CTC_CHANNEL_3 0x03
+
+#define CTC_CTRL_OR_VECTOR_BIT 0x01
+#define CTC_RST_BIT            0x02
+#define CTC_TIME_CONST_BIT     0x04
+#define CTC_TIME_TRG_BIT       0x08
+#define CTC_CLK_TRG_BIT        0x10
+#define CTC_PRESCALER_BIT      0x20
+#define CTC_MODE_BIT           0x40
+#define CTC_INT_BIT            0x80
+
+#define CTC_CTRL(x) ((x) | CTC_CTRL_OR_VECTOR_BIT)
+
+// ********************************************************
+#define PORT_A_CTRL 0x42
+#define PORT_A_DATA 0x40
+#define PORT_B_CTRL 0x43
+#define PORT_B_DATA 0x41
+
+#define PIO_MODE_3  0xCF
+
+#define PIO_INT_CTRL(x) ((x) | 0x07)
+#define PIO_OR       0x00
+#define PIO_AND      0x40
+#define PIO_LOW      0x00
+#define PIO_HIGH     0x20
+#define PIO_MASK     0x10
+#define PIO_INT_EN   0x80
+
+// ********************************************************
+#define SIO_A_CTRL 0x22
+#define SIO_A_DATA 0x20
+#define SIO_B_CTRL 0x23
+#define SIO_B_DATA 0x21
+
+#define SIO_EX_INT_EN             0x01
+#define SIO_TX_INT_EN             0x02
+#define SIO_STATUS_AFFECTS_VECTOR 0x04
+#define SIO_RX_INT_MD0            0x08
+#define SIO_RX_INT_MD1            0x10
+#define SIO_WAIT_RDY_ON_RX_TX     0x20
+#define SIO_WAIT_RDY_FTN          0x40
+#define SIO_WAIT_RDY_EN           0x80
+
+// ********************************************************
+#define TFT_CTRL 0x60
+#define TFT_DATA 0x61
+
+#ifndef ASSEMBLY
+__sfr __at(CTC_CHANNEL_0) ctc_channel_0;
+__sfr __at(CTC_CHANNEL_1) ctc_channel_1;
+__sfr __at(CTC_CHANNEL_2) ctc_channel_2;
+__sfr __at(CTC_CHANNEL_3) ctc_channel_3;
+
+__sfr __at(SIO_A_DATA) sio_a_data;
+__sfr __at(SIO_B_DATA) sio_b_data;
+__sfr __at(SIO_A_CTRL) sio_a_ctrl;
+__sfr __at(SIO_B_CTRL) sio_b_ctrl;
+
+__sfr __at(PORT_A_DATA) port_a_data;
+__sfr __at(PORT_B_DATA) port_b_data;
+__sfr __at(PORT_A_CTRL) port_a_ctrl;
+__sfr __at(PORT_B_CTRL) port_b_ctrl;
+
+__sfr __at(TFT_CTRL) tft_ctrl;
+__sfr __at(TFT_DATA) tft_data;
+
+#define IM(__mode) __asm__("im " #__mode)
+#define EI __asm__("ei")
+#define DI __asm__("di")
+#endif // ASSEMBLY
+
+#endif // HARDWARE_H
diff --git a/include/i2c.h b/include/i2c.h
new file mode 100644
index 0000000..18fa5e9
--- /dev/null
+++ b/include/i2c.h
@@ -0,0 +1,24 @@
+#ifndef I2C_H
+#define I2C_H
+
+#include <stdint.h>
+
+#define NACK 0
+#define ACK 1
+
+void
+i2c_start_condition(void);
+
+void
+i2c_restart_condition(void);
+
+void
+i2c_stop_condition(void);
+
+void
+i2c_send(uint8_t b);
+
+uint8_t
+i2c_recv(uint8_t ack);
+
+#endif // I2C_H
diff --git a/include/input.h b/include/input.h
new file mode 100644
index 0000000..a2f03e2
--- /dev/null
+++ b/include/input.h
@@ -0,0 +1,22 @@
+#ifndef INPUT_H
+#define INPUT_H
+
+#include <fifo.h>
+
+static inline uint8_t
+poll_keys(void)
+{
+	return (port_b_data & 0x7C) >> 2;
+}
+
+enum keys {
+	KEY1 = 0x01,
+	KEY2 = 0x02,
+	KEY3 = 0x04,
+	KEY4 = 0x08,
+	KEY5 = 0x10
+};
+
+extern struct fifo input_fifo;
+
+#endif // INPUT_H
diff --git a/include/tft.h b/include/tft.h
new file mode 100644
index 0000000..22303a1
--- /dev/null
+++ b/include/tft.h
@@ -0,0 +1,132 @@
+#ifndef TFT_H
+#define TFT_H
+
+#include <hardware.h>
+#include <stdint.h>
+
+#define TFT_WIDTH 480
+#define TFT_HEIGHT 320
+
+enum tft_command {
+    NOP        = 0x00,
+    SWRESET    = 0x01,
+    RDDID      = 0x04,
+    RDNUMPE    = 0x05,
+    RDRED      = 0x06,
+    RDGREEN    = 0x07,
+    RDBLUE     = 0x08,
+    RDDPM      = 0x0A,
+    RDDMADCTL  = 0x0B,
+    RDDCOLMOD  = 0x0C,
+    RDDIM      = 0x0D,
+    RDDSM      = 0x0E,
+    RDDSDR     = 0x0F,
+    SPLIN      = 0x10,
+    SLPOUT     = 0x11,
+    PTLON      = 0x12,
+    NORON      = 0x13,
+    INVOFF     = 0x20,
+    INVON      = 0x21,
+    ALLPOFF    = 0x22,
+    ALLPON     = 0x23,
+    GAMSET     = 0x26,
+    DISPOFF    = 0x28,
+    DISPON     = 0x29,
+    CASET      = 0x2A,
+    PASET      = 0x2B,
+    RAMWR      = 0x2C,
+    RAMRD      = 0x2E,
+    PLTAR      = 0x30,
+    VSCRDEF    = 0x33,
+    TEOFF      = 0x34,
+    TEON       = 0x35,
+    MADCTL     = 0x36,
+    VSCRSADD   = 0x37,
+    IDMOFF     = 0x38,
+    IDMON      = 0x39,
+    COLMOD     = 0x3A,
+    CONRAMWR   = 0x3C,
+    CONRAMRD   = 0x3E,
+    TESL       = 0x44,
+    GETSL      = 0x45,
+    WRDISBV    = 0x51,
+    RDDISBV    = 0x52,
+    WRCTRLD    = 0x53,
+    RDCTRLD    = 0x54,
+    WRCABC     = 0x55,
+    RDCABC     = 0x56,
+    WRCABCMB   = 0x5E,
+    RDCABCMB   = 0x5F,
+    RDABVCSDR  = 0x68,
+    RDBWLK     = 0x70,
+    RDBKX      = 0x71,
+    RDBKY      = 0x72,
+    RDWX       = 0x73,
+    RDWY       = 0x74,
+    RDRGLB     = 0x75,
+    RDRX       = 0x76,
+    RDRY       = 0x77,
+    RDGX       = 0x78,
+    RDGY       = 0x79,
+    RDBALB     = 0x7A,
+    RDBX       = 0x7B,
+    RDBY       = 0x7C,
+    RDAX       = 0x7D,
+    RDAY       = 0x7E,
+
+    RDID1      = 0xDA,
+    RDID2      = 0xDB,
+    RDID3      = 0xDC,
+    SETOSC     = 0xB0,
+    SETPOWER   = 0xB1,
+    SETDISCTRL = 0xB2,
+    SETRGB     = 0xB3,
+    SETCYC     = 0xB4,
+    SETBGP     = 0xB5,
+    SETCOM     = 0xB6,
+    SETOTP     = 0xB7,
+    SETEXTC    = 0xB9,
+    SETSTBA    = 0xC0,
+    SETDGC     = 0xC1,
+    SETID      = 0xC3,
+    SETDDB     = 0xC4,
+    SETCABC    = 0xC9,
+    SETPANEL   = 0xCC,
+    SETGAMMA   = 0xE0,
+    SETIMAGE   = 0xE9,
+    SETMESSI   = 0xEA,
+    SETCOLOR   = 0xEB
+};
+
+enum pixel_format {
+    BIT12 = 0x03,
+    BIT16 = 0x05,
+    BIT18 = 0x06,
+    BIT24 = 0x07
+};
+
+static inline void
+tft_ram_wr(void)
+{
+	tft_ctrl = RAMWR;
+}
+
+static inline void
+tft_pixel(uint8_t r, uint8_t g, uint8_t b)
+{
+	tft_data = r;
+	tft_data = g;
+	tft_data = b;
+}
+
+void
+tft_set_area(unsigned int x, unsigned int y, unsigned int w, unsigned int h);
+
+void
+tft_init(void);
+
+void
+clear_screen(void);
+
+
+#endif // TFT_H
diff --git a/include/tty.h b/include/tty.h
new file mode 100644
index 0000000..ea73e5f
--- /dev/null
+++ b/include/tty.h
@@ -0,0 +1,34 @@
+#ifndef TTY_H
+#define TTY_H
+
+#include <tft.h>
+#define TTY_WIDTH (TFT_WIDTH / 8)
+#define TTY_HEIGHT (TFT_HEIGHT / 8)
+
+void
+addch(char c);
+
+void
+addstr(const char *str);
+
+void
+setcur(unsigned int ncol, unsigned int nrow);
+
+void
+swap_colors(void);
+
+static inline void
+mvaddch(int y, int x, char c)
+{
+	setcur(x, y);
+	addch(c);
+}
+
+static inline void
+mvaddstr(int y, int x, const char *str)
+{
+	setcur(x, y);
+	addstr(str);
+}
+
+#endif // TTY_H
diff --git a/include/zeta.h b/include/zeta.h
new file mode 100644
index 0000000..291a2ff
--- /dev/null
+++ b/include/zeta.h
@@ -0,0 +1,67 @@
+#ifndef ZETA_H
+#define ZETA_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef int64_t s64;
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+#define LENGTH(x) (sizeof(x) / sizeof(x[0]))
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+
+// Corrent version, but the compiler does not recognize this as a constant
+// expression
+// #define ISR_ADDRESS(x) (((u16)&x) & 0xFF)
+#define ISR_ADDRESS(x) ((u16)&x)
+
+extern void *rx_isr_ptr;
+extern void *ctc0_isr_ptr;
+extern void *ctc1_isr_ptr;
+extern void *ctc2_isr_ptr;
+extern void *ctc3_isr_ptr;
+extern void *port_a_isr_ptr;
+extern void *port_b_isr_ptr;
+
+void
+bootloader(void);
+
+uint16_t
+crc16(const void *buf, size_t len);
+
+void
+_menu(void);
+
+static inline int
+max(int a, int b)
+{
+	return a > b ? a : b;
+}
+
+static inline int
+min(int a, int b)
+{
+	return a < b ? a : b;
+}
+
+static inline int
+clamp(int v, int low, int high)
+{
+	return min(max(v, low), high);
+}
+
+static inline uint8_t
+bcd(uint8_t x)
+{
+	return ((x / 10) << 4) | (x % 10);
+}
+
+#endif // ZETA_H