bool antenna_changed(struct setting *s, const char *val)
{
if (s->type->from_string(s->type->priv, s->addr, s->len, val))
{
max2769_conf1 &= MAX2769_CONF1_LNAMODE_MASK;
switch (antenna) {
default:
case AUTO:
max2769_conf1 |= MAX2769_CONF1_LNAMODE_GATED;
break;
case PATCH:
max2769_conf1 |= MAX2769_CONF1_LNAMODE_LNA1;
break;
case EXTERNAL:
max2769_conf1 |= MAX2769_CONF1_LNAMODE_LNA2;
break;
}
max2769_write(MAX2769_CONF1, max2769_conf1);
printf("Antenna changed to: %s\n", val);
return true;
}
return false;
}
/** Setup MAX2769 GPIOs and write default settings to MAX2769 registers. */
void max2769_setup(void)
{
/* Setup MAX2769 PGM (PB8) - low */
RCC_AHB1ENR |= RCC_AHB1ENR_IOPBEN;
gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLDOWN, GPIO8);
gpio_clear(GPIOB, GPIO8);
/* Setup MAX2769 NSHDN (PB9) - high */
gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, GPIO9);
gpio_set(GPIOB, GPIO9);
/* Setup MAX2769 NIDLE (PB10) - high */
gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, GPIO10);
gpio_set(GPIOB, GPIO10);
max2769_write(MAX2769_CONF1, MAX2769_CONF1_CHIPEN |
MAX2769_CONF1_ILNA1(15) |
MAX2769_CONF1_ILNA2(3) |
MAX2769_CONF1_ILO(3) |
MAX2769_CONF1_IMIX(3) |
MAX2769_CONF1_MIXPOLE_13MHZ |
MAX2769_CONF1_MIXEN |
MAX2769_CONF1_ANTEN |
//MAX2769_CONF1_FCEN(7) | /* 1 MHz IF filter center freq. */
//MAX2769_CONF1_FCEN(43) | /* 2 Mhz IF filter center freq. */
MAX2769_CONF1_FCEN(21) | /* 4 Mhz IF filter center freq. */
//MAX2769_CONF1_FCEN(42) | /* 8 Mhz IF filter center freq. */
MAX2769_CONF1_FBW_2_5MHZ |
MAX2769_CONF1_F3OR5_5 |
MAX2769_CONF1_FCENX_BP |
MAX2769_CONF1_FGAIN_HIGH |
MAX2769_CONF1_LNAMODE_GATED);
max2769_write(MAX2769_CONF2,
//MAX2769_CONF2_IQEN |
MAX2769_CONF2_GAINREF(170) | /* optimal for 2 bits */
//MAX2769_CONF2_GAINREF(82) | /* optimal for 3 bits */
MAX2769_CONF2_AGCMODE_INDEP |
MAX2769_CONF2_FORMAT_SIGN_MAG |
MAX2769_CONF2_BITS_1 |
MAX2769_CONF2_DRVCFG_CMOS |
MAX2769_CONF2_LOEN
);
max2769_write(MAX2769_CONF3,
MAX2769_CONF3_RESERVED |
MAX2769_CONF3_GAININ(58) |
MAX2769_CONF3_FSLOWEN |
MAX2769_CONF3_ADCEN |
MAX2769_CONF3_DRVEN |
MAX2769_CONF3_FOFSTEN |
MAX2769_CONF3_FILTEN |
MAX2769_CONF3_FHIPEN |
MAX2769_CONF3_PGAIEN |
//MAX2769_CONF3_PGAQEN |
/* STRM stuff was set before but its unused,
* can leave as zeros. */
0
);
max2769_write(MAX2769_PLLCONF,
MAX2769_PLLCONF_RESERVED |
MAX2769_PLLCONF_VCOEN |
MAX2769_PLLCONF_REFOUTEN |
//MAX2769_PLLCONF_REFDIV_DIV_2 | /* 8.184 MHz sample rate */
MAX2769_PLLCONF_REFDIV_DIV_NONE | /* 16.368 MHz sample rate */
MAX2769_PLLCONF_IXTAL_BUFF_NORMAL |
MAX2769_PLLCONF_XTALCAP(0b10000) |
MAX2769_PLLCONF_LDMUX(0) |
MAX2769_PLLCONF_ICP_1MA |
MAX2769_PLLCONF_CPTEST(0) |
MAX2769_PLLCONF_INTPLL
);
max2769_write(MAX2769_DIV,
//MAX2769_DIV_NDIV(1538) | /* 2 * 1.023 MHz IF */
MAX2769_DIV_NDIV(1536) | /* 4 * 1.023 MHz IF */
MAX2769_DIV_RDIV(16)
);
max2769_write(MAX2769_FDIV,
MAX2769_FDIV_RESERVED |
MAX2769_FDIV_FDIV(0x80000)
);
max2769_write(MAX2769_CLK,
MAX2769_CLK_L_CNT(1) |
MAX2769_CLK_M_CNT(4095) |
MAX2769_CLK_SERCLK
);
}