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Code Activity

tools: give the driver control over CLKM (for ATmega32U2 boards)

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- include/atrf.h (atrf_set_clkm), lib/atrf.c (atrf_set_clkm): set or
  disable CLKM
- lib/driver.h (atrf_set_clkm_generic), lib/atrf.c (atrf_set_clkm_generic):
  generic function to set CLKM without restrictions
- lib/driver.h (struct atrf_driver): added driver operation "set_clkm"
  to set CLKM
- lib/atusb.c (atusb_set_clkm, atusb_driver): restrict CLKM on ATmega32U2
  boards
- atrf-txrx/atrf-txrx.c (init_txrx): use atrf_set_clkm to set CLKM
- atrf-txrx/atrf-txrx.c (init_txrx, main): pass CLKM frequency in MHz
  instead of code point
This commit is contained in:
Werner Almesberger
2011-02-10 23:11:34 -03:00
parent e73ca5fcd5
commit b0c15b7e7c
5 changed files with 111 additions and 19 deletions
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47
tools/lib/atusb.c
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@@ -1,8 +1,8 @@
/*
* lib/atusb.c - ATUSB access functions library (USB version)
*
* Written 2010 by Werner Almesberger
* Copyright 2010 Werner Almesberger
* Written 2010-2011 by Werner Almesberger
* Copyright 2010-2011 Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -227,6 +227,48 @@ static int atusb_interrupt(void *dsc)
}
/* ----- CLKM handling ----------------------------------------------------- */
/*
* ATmega32U2-based boards don't allow disabling CLKM, so we keep it at 8 MHz.
* We could accommodate a choice between 8 MHz and 16 MHz, but that's for
* later.
*/
static int atusb_set_clkm(void *dsc, int mhz)
{
usb_dev_handle *dev = dsc;
uint8_t ids[3];
int res;
if (error)
return 0;
res = usb_control_msg(dev, FROM_DEV, ATUSB_ID, 0, 0,
(void *) ids, 3, 1000);
if (res < 0) {
fprintf(stderr, "ATUSB_ID: %s\n", usb_strerror());
error = 1;
return 0;
}
switch (ids[2]) {
case HW_TYPE_100813:
case HW_TYPE_101216:
break;
case HW_TYPE_110131:
if (mhz == 0 || mhz == 8)
return 1;
fprintf(stderr, "this board only supports CLKM = 8 MHz\n");
return 0;
default:
fprintf(stderr,
"atusb_set_clkm: unknown hardware type 0x%02x\n", ids[2]);
return 0;
}
return atrf_set_clkm_generic(atusb_reg_write, dsc, mhz);
}
/* ----- driver interface -------------------------------------------------- */
@@ -239,6 +281,7 @@ struct atrf_driver atusb_driver = {
.reset = atusb_reset,
.reset_rf = atusb_reset_rf,
.test_mode = atusb_test_mode,
.set_clkm = atusb_set_clkm,
.reg_write = atusb_reg_write,
.reg_read = atusb_reg_read,
.buf_write = atusb_buf_write,