init commit

Makefile

@@ -0,0 +1,24 @@
+CC=gcc
+CFLAGS= -c -g -Wall
+
+LDLIBS = $(shell pkg-config --libs --cflags libusb-1.0)
+
+TARGET := receipt-printer
+
+BUILD_DIR := ./build
+SRC_DIRS := ./src
+
+SRCS := $(shell find $(SRC_DIRS) -name '*.c')
+
+OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
+
+$(BUILD_DIR)/$(TARGET): $(OBJS)
+	$(CC) $(OBJS) -o $@ $(LDLIBS)
+
+$(BUILD_DIR)/%.c.o: %.c
+	mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILD_DIR)

src/main.c

@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "printer.h"
+
+int main(void)
+{
+	int err;
+	bool detached = false;
+	libusb_device_handle *dev_handler;
+	
+	/* Init BEGIN */
+
+	err = libusb_init_context(NULL, NULL, 0);
+	if (err != 0) { 
+		perror("LIBUSB Error");
+		exit(-1);
+	}
+
+
+	dev_handler = libusb_open_device_with_vid_pid(NULL, 
+				PRINTER_VENDOR_ID, PRINTER_PRODUCT_ID);
+	
+	err = libusb_open(libusb_get_device(dev_handler), &dev_handler);
+	if (err != 0) {
+		perror("libusb_open");
+		exit(-1);
+	}
+
+	err = libusb_kernel_driver_active(dev_handler, 0);
+	if (err != 0) {
+		libusb_detach_kernel_driver(dev_handler, 0);
+		detached = true;
+	}
+
+	err = libusb_claim_interface(dev_handler, 0);
+	if (err != 0)
+		perror("libusb_claim_interface");
+
+	/* Init END */
+
+
+	printer_initialize(dev_handler, true);
+
+	printer_feed(dev_handler, 0x10);
+
+	char* str = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd";
+	
+	printer_print(dev_handler, str, strlen(str));
+
+	printer_feed(dev_handler, 0x10);
+
+	printer_cut(dev_handler, false);
+
+
+	/* Cleanup BEGIN */
+
+	err = libusb_release_interface(dev_handler, 0);
+	if (err)
+		perror("libusb_release_interface");
+
+	if (detached)
+		libusb_attach_kernel_driver(dev_handler, 0);
+
+	libusb_close(dev_handler);
+
+	
+	libusb_exit(NULL);
+
+	/* Cleanup END */
+}

src/printer.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+
+#include "printer.h"
+
+void send_msg(libusb_device_handle* dev_handler, unsigned char* data, size_t len)
+{
+	int err = libusb_bulk_transfer(dev_handler, PRINTER_ENDPOINT, data, len, NULL, 0);
+	if (err != 0)
+		perror("libusb_bulk_transfer");
+}
+
+void printer_initialize(libusb_device_handle* dev_handler, bool beep)
+{
+	unsigned char data[2] = {0x1B, 0x40}; // 0x1B 0x40 is printer initialize
+
+	send_msg(dev_handler, data, 2);
+
+
+	if (!beep)
+		return;
+
+	data[1] = 0x07; // 0x1B 0x07 is beep
+	for (int i = 0; i < 2; i++)
+		send_msg(dev_handler, data, 2);
+}
+
+void printer_feed(libusb_device_handle* dev_handler, uint8_t lines)
+{
+	unsigned char data[2] = {0x14, lines}; 
+	
+	send_msg(dev_handler, data, 2);
+}
+
+void printer_cut(libusb_device_handle* dev_handler, bool partial)
+{
+	unsigned char data[1] = {0x19};
+	if (partial)
+		data[0] = 0x1A;
+
+	send_msg(dev_handler, data, 1);
+}
+
+void printer_print(libusb_device_handle* dev_handler, char* text, size_t len)
+{
+	send_msg(dev_handler, (unsigned char*) text, len);	
+
+	unsigned char data[1] = {0x17};
+	send_msg(dev_handler, data, 1);
+}

src/printer.h

@@ -0,0 +1,26 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#include <libusb-1.0/libusb.h>
+
+#ifndef PRINTER_H
+#define PRINTER_H
+
+// would love for this to be cli arguments
+#define PRINTER_VENDOR_ID 0x0404
+#define PRINTER_PRODUCT_ID 0x0312
+
+#define PRINTER_ENDPOINT 0x02
+
+void send_msg(libusb_device_handle* dev_handler, unsigned char* data, size_t len);
+
+void printer_initialize(libusb_device_handle* dev_handler, bool beep);
+
+void printer_feed(libusb_device_handle* dev_handler, uint8_t lines);
+
+void printer_cut(libusb_device_handle* dev_handler, bool partial);
+
+void printer_print(libusb_device_handle* dev_handler, char* text, size_t len);
+
+#endif