From b6f033950171192fe8069b258757971c85c451c1 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@mur.at>
Date: Wed, 27 Feb 2013 23:35:54 +0000
Subject: rda1846dongle: added support for register writes beyond 0x7F

git-svn-id: https://svn.spreadspace.org/mur.sat@685 7de4ea59-55d0-425e-a1af-a3118ea81d4c
---
 software/rda1846dongle/rda1846.c | 48 ++++++++++++++++++++++++++++++++--------
 software/rda1846dongle/rda1846.h |  2 ++
 2 files changed, 41 insertions(+), 9 deletions(-)

(limited to 'software')

diff --git a/software/rda1846dongle/rda1846.c b/software/rda1846dongle/rda1846.c
index 5277d3e..eaa0fbc 100644
--- a/software/rda1846dongle/rda1846.c
+++ b/software/rda1846dongle/rda1846.c
@@ -29,12 +29,10 @@
 #define RDA1846_CHIP_ADDR  0xE2
 #define RDA1846_ADDR_W    (0<<7)
 #define RDA1846_ADDR_R    (1<<7)
+#define RDA1846_ADDR_LIMIT 0x7F
 
-uint8_t rda1846_write_register(const uint8_t addr, const uint16_t data)
+static uint8_t rda1846_write_register_raw(const uint8_t addr, const uint16_t data)
 {
-  if(addr >= 0x7F)  // no support for this at the moment !!!
-    return 255;
-
   if(TWI_StartTransmission(RDA1846_CHIP_ADDR | TWI_ADDRESS_WRITE,10) != TWI_ERROR_NoError)
     return 1;
 
@@ -53,11 +51,8 @@ i2c_error:
   return 1;
 }
 
-uint8_t rda1846_read_register(const uint8_t addr, uint16_t* data)
+static uint8_t rda1846_read_register_raw(const uint8_t addr, uint16_t* data)
 {
-  if(addr >= 0x7F) // no support for this at the moment !!!
-    return 255;
-
   if(TWI_StartTransmission(RDA1846_CHIP_ADDR | TWI_ADDRESS_WRITE,10) != TWI_ERROR_NoError)
     return 1;
   if(!TWI_SendByte(addr | RDA1846_ADDR_R))
@@ -71,7 +66,7 @@ uint8_t rda1846_read_register(const uint8_t addr, uint16_t* data)
   *data = tmp << 8;
   if(!TWI_ReceiveByte(&tmp, 1))
     goto i2c_error;
-  data |= tmp;
+  *data |= tmp;
 
   TWI_StopTransmission();
   return 0;
@@ -81,7 +76,42 @@ i2c_error:
   return 1;
 }
 
+
 void rda1846_init(void)
 {
   TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 200000));
 }
+
+uint8_t rda1846_write_register(const uint8_t addr, const uint16_t data)
+{
+  if(addr < RDA1846_ADDR_LIMIT)
+    return rda1846_write_register_raw(addr, data);
+
+  if(addr > RDA1846_ADDR_LIMIT) {
+    uint8_t ret = rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 1);
+    if(ret) return ret;
+
+    ret = rda1846_write_register_raw(addr, data);
+    if(ret) return ret;
+
+    return rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 0);
+  }
+  return 1;
+}
+
+uint8_t rda1846_read_register(const uint8_t addr, uint16_t* data)
+{
+  if(addr < RDA1846_ADDR_LIMIT)
+    return rda1846_read_register_raw(addr, data);
+
+  if(addr > RDA1846_ADDR_LIMIT) {
+    uint8_t ret = rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 1);
+    if(ret) return ret;
+
+    ret = rda1846_read_register_raw(addr, data);
+    if(ret) return ret;
+
+    return rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 0);
+  }
+  return 1;
+}
diff --git a/software/rda1846dongle/rda1846.h b/software/rda1846dongle/rda1846.h
index e320fd3..1d2a2ae 100644
--- a/software/rda1846dongle/rda1846.h
+++ b/software/rda1846dongle/rda1846.h
@@ -34,5 +34,7 @@
 #define MURSAT_rda1846_h_INCLUDED
 
 void rda1846_init(void);
+uint8_t rda1846_write_register(const uint8_t addr, const uint16_t data);
+uint8_t rda1846_read_register(const uint8_t addr, uint16_t* data);
 
 #endif
-- 
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