Add cp2103 stuff

[pub/pl2303-ft232-gpio.git] / cp2103.c

diff --git a/cp2103.c b/cp2103.c
new file mode 100644 (file)
index 0000000..5e4f61e
--- /dev/null
+++ b/cp2103.c
@@ -0,0 +1,141 @@
+#include <stdio.h>
+#include <stdlib.h>
+/* According to POSIX.1-2001 */
+#include <sys/select.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <usb.h>
+#include <getopt.h>
+#include <stdint.h>
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+
+#define I_VENDOR_NUM        0x10c4
+#define I_PRODUCT_NUM       0xea60
+
+
+#define VENDOR_READ_REQUEST_TYPE       0xc0
+#define VENDOR_READ_REQUEST            0x01
+
+#define VENDOR_WRITE_REQUEST_TYPE      0x40
+#define VENDOR_WRITE_REQUEST           0x01
+
+/* CP2103 GPIO */
+#define GPIO_0 0x01
+#define GPIO_1 0x02
+#define GPIO_2 0x04
+#define GPIO_3 0x08
+#define GPIO_MASK      (GPIO_0|GPIO_1|GPIO_2|GPIO_3)
+
+
+
+//GPIO_READ
+//ret = cp210x_ctlmsg(port, 0xff, 0xc0, 0x00c2, 0, gpio, 1);
+//type c0
+//value c2
+//index 0
+//buffer 1 bytes
+//length 1
+
+
+/* Get current GPIO register from PL2303 */
+char gpio_read_reg(usb_dev_handle *h)
+{
+       char buf;
+       int bytes = usb_control_msg(
+               h,             // handle obtained with usb_open()
+               0xc0, // bRequestType
+               0xff,      // bRequest
+               0xc2,              // wValue
+               0,              // wIndex
+               &buf,             // pointer to destination buffer
+               1,  // wLength
+               100
+               );
+       handle_error(bytes);
+       return buf;
+}
+
+// GPIO_WRITE
+//request 0xff
+//type 0x40
+//value 0x37e1
+//index gpioreg
+//data NULL
+//len 0
+void gpio_write_reg(usb_dev_handle *h, uint16_t reg)
+{
+       int bytes = usb_control_msg(
+               h,             // handle obtained with usb_open()
+               0x40, // bRequestType
+               0xff,      // bRequest
+               0x37e1,              // wValue
+               reg,              // wIndex
+               0,             // pointer to destination buffer
+               0,  // wLength
+               6000
+               );
+       handle_error(bytes);
+}
+
+
+void gpio_out(usb_dev_handle *h, int gnum, int value)
+{
+
+       uint16_t gpio = 0;
+       switch (gnum) { 
+       case 0: 
+               gpio |= GPIO_0;
+               if (value) 
+                       gpio |= (GPIO_0 << 8);
+               break;
+       case 1: 
+               gpio |= GPIO_1;
+               if (value) 
+                       gpio |= (GPIO_1 << 8);
+               break;
+       case 2: 
+               gpio |= GPIO_2;
+               if (value) 
+                       gpio |= (GPIO_2 << 8);
+               break;
+       case 3: 
+               gpio |= GPIO_3;
+               if (value) 
+                       gpio |= (GPIO_3 << 8);
+               break;
+       }
+       gpio_write_reg(h, gpio);
+}
+
+void gpio_in(usb_dev_handle *h, int gpio, int pullup)
+{
+       printf("FixMe: don't know how to make pins input on cp2103\n");
+}
+
+int gpio_read(usb_dev_handle *h, int gpio)
+{
+       printf("FixMe: don't know how to read pins on cp2103\n");
+}
+
+
+extern usb_dev_handle *nc_usb_open(int vendor, int product, 
+                                  const char *vendor_name, const char *product_name, const char *serial);
+void check_handle(usb_dev_handle **h, const char* manuf, const char* product, const char* serial)
+{
+       if (*h)
+               return;
+
+       *h = nc_usb_open(I_VENDOR_NUM, I_PRODUCT_NUM, manuf, product, serial);
+       if (!(*h)) {
+               fprintf(stderr, "No CP2103 USB device %04x:%04x found ;(\n", I_VENDOR_NUM, I_PRODUCT_NUM);
+               exit(1);
+       }
+}