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atusb/fw/: define USB bus current (40 mA) in board.h based on measured value

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The measured values are:

board idle, looping	  9 mA
LED on			+ 5 mA
TX CW (+3 dBm)		+14 mA
			------
			 28 mA
			======

Adding a margin of 12 mA, we get 40 mA. DFU used 30 mA so far, the
application 50 mA.

- board.h (BOARD_MAX_mA): define maximum USB bus current
- descr.c (config_descriptor), usb/dfu.c (config_descriptor):
  use BOARD_MAX_mA for bMaxPower instead of hard-coding values
This commit is contained in:
Werner Almesberger 2011-06-10 18:48:16 -03:00
parent 89d13ce8f8
commit 3cc92cc4a6
3 changed files with 4 additions and 2 deletions
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2
atusb/fw/board.h
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@ -62,6 +62,8 @@
#define DFU_USB_PRODUCT USB_PRODUCT #define DFU_USB_PRODUCT USB_PRODUCT
#define BOARD_MAX_mA 40
#define HAS_BOARD_SERNUM #define HAS_BOARD_SERNUM
extern uint8_t board_sernum[42]; extern uint8_t board_sernum[42];

2
atusb/fw/descr.c
View File

@ -61,7 +61,7 @@ const uint8_t config_descriptor[] = {
1, /* bConfigurationValue (> 0 !) */ 1, /* bConfigurationValue (> 0 !) */
0, /* iConfiguration */ 0, /* iConfiguration */
USB_ATTR_BUS_POWERED, /* bmAttributes */ USB_ATTR_BUS_POWERED, /* bmAttributes */
50/2, /* bMaxPower (50 mA) */ ((BOARD_MAX_mA)+1)/2, /* bMaxPower */
/* Interface #0 */ /* Interface #0 */

2
atusb/fw/usb/dfu.c
View File

@ -73,7 +73,7 @@ const uint8_t config_descriptor[] = {
0, /* iConfiguration */ 0, /* iConfiguration */
// USB_ATTR_SELF_POWERED | USB_ATTR_BUS_POWERED, // USB_ATTR_SELF_POWERED | USB_ATTR_BUS_POWERED,
USB_ATTR_BUS_POWERED, /* bmAttributes */ USB_ATTR_BUS_POWERED, /* bmAttributes */
15, /* bMaxPower */ ((BOARD_MAX_mA)+1)/2, /* bMaxPower */
/* Interface #0 */ /* Interface #0 */