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new frame format, smaller and with crc. Some code simplified

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This commit is contained in:
Philippe Teuwen 2019-04-16 20:00:17 +02:00
commit 44bbb7d2c7
7 changed files with 70 additions and 52 deletions
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12
include/usb_cmd.h
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@ -37,24 +37,20 @@ typedef struct {
typedef struct {
uint32_t magic;
uint32_t length; // length of the variable part, 0 if none.
uint16_t length; // length of the variable part, 0 if none.
uint16_t cmd;
} PACKED UsbCommandNGPreamble;
#define USB_PREAMBLE_MAGIC 0xAA5500FF
typedef struct {
uint64_t cmd;
uint64_t arg[3];
} PACKED UsbCommandNG;
typedef struct {
uint32_t crc;
uint32_t magic;
} PACKED UsbCommandNGPostamble;
#define USB_POSTAMBLE_MAGIC 0xFF0055AA
extern bool use_cmd_ng;
#define USB_PACKET_NG_MINLEN (sizeof(UsbCommandNGPreamble) + sizeof(UsbCommandNGPostamble))
#define USB_PACKET_NG_MAXLEN (sizeof(UsbCommandNGPreamble) + USB_CMD_DATA_SIZE + sizeof(UsbCommandNGPostamble))
#ifdef WITH_FPC_HOST
// "Session" flag, to tell via which interface next msgs should be sent: USB or FPC USART